Shown with a cast-on count of 72 stitches.  

• Rounds 1-6: [K3, p1] 18 times.
• Round 7: [K3, p1] 9 times, k2tog, k1, p1, [k3, p1] 8 times (71 sts).
• Round 8: [K3, p1] 9 times, k2tog, p1, [k3, p1] 8 times (70 sts).
• Round 9: [K3, p1] 9 times, k2tog, [k3, p1] 8 times (69 sts).
• Round 10: [K3, p1] 9 times, k2tog, k2, p1, [k3, p1] 7 times (68 sts).
• Round 11: [K3, p1] 9 times, k2tog, k1, p1, [k3, p1] 7 times (67 sts).
• Round 12: [K3, p1] 9 times, k2tog, p1, [k3, p1] 7 times (66 sts).
• Round 13: [K3, p1] 9 times, k1, p1, [k3, p1] 7 times.
• Round 14: [K3, p1] 9 times, k2tog, [k3, p1] 7 times (65 sts).
• Round 15: [K3, p1] 9 times, k1, [k3, p1] 7 times.
• Round 16: [K3, p1] 9 times, k2tog, k2, p1, [k3, p1] 6 times (64 sts).