Shown with a cast-on count of 2 stitches.  

• Round 1: K1, kfb (3 sts).
• Round 2: Kfb, k2 (4 sts).
• Round 3: K3, kfb (5 sts).
• Round 4: Kfb, k4 (6 sts).
• Round 5: K2, yo, k2, yo, k2 (8 sts).
• Round 6: K8.
• Round 7: K2, yo, k4, yo, k2 (10 sts).
• Round 8: K10.
• Round 9: K2, yo, k6, yo, k2 (12 sts).
• Round 10: K12.
• Round 11: K2, yo, k8, yo, k2 (14 sts).
• Round 12: K14.
• Round 13: K2, yo, k10, yo, k2 (16 sts).
• Round 14: K16.
• Round 15: K2, yo, k12, yo, k2 (18 sts).
• Round 16: K18.
• Round 17: K2, yo, k14, yo, k2 (20 sts).
• Round 18: K20.
• Round 19: K2, yo, k16, yo, k2 (22 sts).
• Round 20: K22.
• Round 21: K2, yo, k18, yo, k2 (24 sts).
• Round 22: K24.
• Round 23: K2, yo, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, yo, k2 (26 sts).
• Round 24: K5, yo, k4, k2tog, k4, k2tog, k4, yo, k5.
• Round 25: K2, yo, k4, yo, k4, k2tog, k2, k2tog, k4, yo, k4, yo, k2 (28 sts).
• Round 26: K8, yo, k4, [k2tog] twice, k4, yo, k8.
• Round 27: K2, yo, k3, yo, k4, k2tog, k6, k2tog, k4, yo, k3, yo, k2 (30 sts).
• Round 28: K7, yo, k4, k2tog, k4, k2tog, k4, yo, k7.
• Round 29: K2, yo, k1, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k1, yo, k2 (32 sts).
• Round 30: K3, k2tog, yo, k5, yo, k4, [k2tog] twice, k4, yo, k10.
• Round 31: K2, yo, k2, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2, yo, k2 (34 sts).
• Round 32: K3, k2tog, k1, yo, k3, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k1, k2tog, k3.
• Round 33: K2, yo, k3, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k3, yo, k2 (36 sts).
• Round 34: K4, k2tog, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k2, k2tog, k3.
• Round 35: K2, yo, k2, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k2, yo, k2.
• Round 36: K6, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k7 (38 sts).
• Round 37: K2, yo, k5, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k5, yo, k2 (40 sts).
• Round 38: K3, k2tog, k3, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k4, k2tog, k3.
• Round 39: K2, yo, k6, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k6, yo, k2 (42 sts).
• Round 40: K3, k2tog, k4, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k5, k2tog, k3.
• Round 41: K2, yo, k5, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k7, yo, k2 (43 sts).
• Round 42: K9, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k11 (45 sts).
• Round 43: K2, yo, k5, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, yo, k2 (46 sts).
• Round 44: K3, [k2tog] twice, k1, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, [k2tog] twice, k4.
• Round 45: K2, yo, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, yo, k2 (48 sts).
• Round 46: K3, [k2tog] twice, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, [k2tog] twice, k3.
• Round 47: K2, yo, k7, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k7, yo, k2 (50 sts).
• Round 48: K3, [k2tog] twice, k3, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k3, [k2tog] twice, k3.
• Round 49: K2, yo, k6, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k6, yo, k2 (52 sts).
• Round 50: K3, [k2tog] twice, k2, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k2, [k2tog] twice, k3.
• Round 51: K2, yo, k9, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k9, yo, k2 (54 sts).
• Round 52: K6, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k6 (56 sts).
• Round 53: K2, yo, k3, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k3, yo, k2.
• Round 54: K3, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k3.
• Round 55: K2, yo, k11, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k11, yo, k2 (58 sts).
• Round 56: K8, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k8 (60 sts).
• Round 57: K2, yo, k5, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k5, yo, k2.
• Round 58: K5, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k5.
• Round 59: K2, yo, k13, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k13, yo, k2 (62 sts).
• Round 60: K10, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k10 (64 sts).
• Round 61: K2, yo, k7, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k7, yo, k2.
• Round 62: K7, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k7.
• Round 63: K2, yo, k9, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k9, yo, k2.
• Round 64: K11, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k11 (66 sts).
• Round 65: K2, yo, k14, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k14, yo, k2 (68 sts).
• Round 66: K11, k2tog, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, k2tog, k11 (70 sts).
• Round 67: K2, yo, k12, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k12, yo, k2.
• Round 68: K8, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k8.
• Round 69: K2, yo, k10, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k10, yo, k2.
• Round 70: K6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k6 (72 sts).
• Round 71: K2, yo, k13, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k13, yo, k2.
• Round 72: K5, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k5 (74 sts).
• Round 73: K2, yo, k4, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k4, yo, k2.
• Round 74: K8, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k8 (76 sts).
• Round 75: K2, yo, k3, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k3, yo, k2.
• Round 76: K7, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k3, yo, k4, yo, k4, k2tog, k4, k2tog, k4, yo, k7 (78 sts).
• Round 77: K2, yo, k6, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k3, k2tog, yo, k2tog, k3, yo, k4, k2tog, k2, k2tog, k4, yo, k6, yo, k2.
• Round 78: K10, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k5, yo, k6, yo, k4, [k2tog] twice, k4, yo, k10 (80 sts).
• Round 79: K2, yo, k2, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2tog, k1, yo, k4, k2tog, k6, k2tog, k4, yo, k1, k2tog, yo, k2, yo, k2.