How much yarn did you use?

Hi--I've knit up quite a bit of my sweater since I last posted; I've finished the body and one sleeve. Unfortunately, I think I'm going to run out of yarn. I have a question for those of you who used KnitPicks' Andean Silk: how many skeins did you use, and for what size? I'm making the smallest size, and I have 8 skeins to work with. I've ordered two more, but will that be enough? Mathwise, it works out, but the errata says that some knitters have needed more yarn than is called for in the pattern, so I guess the yardage in the pattern isn't accurate. Thanks!