Eyelet Lace 57 in the round

PATTERN IN THE ROUND
Cast on a multiple of 18 stitches.
Round 1: *K1, yo, k1, ssk, k10, k2tog, k1, yo, k1, repeat from *.
Rounds 2, 4, 6, 8, 10, and 12: Knit.
Round 3: *K2, yo, k1, ssk, k8, k2tog, k1, yo, k2, repeat from *.
Round 5: *K3, yo, k1, ssk, k2tog, k1, yo, yo, k1, ssk, k2tog, k1, yo, k3, repeat from *.
Round 7: *K5, ssk, k1, yo, k2, yo, k1, k2tog, k5, repeat from *.
Round 9: *K4, ssk, k1, yo, k4, yo, k1, k2tog, k4, repeat from *.
Round 11: *Yo, k1, ssk, k2tog, k1, yo, k6, yo, k1, ssk, k2tog, k1, yo, repeat from *.
Repeat rounds 1-12.
Worked flat, see Eyelet Lace 57: Amphora stitch