I don't know. What I DO know is that I'm spending more on fabric as time passes and I become more knowledgeable about fabric quality, etc., and more ambitious in my project choices.
I don't buy kits because they cost way more than I'm willing to spend and I like to design my own quilt tops. I am now "gathering" the necessary items, including a book, to make what I hope to be a fabulous French Braid quilt. I've just bought a lot of 2-1/2" strips, which cost much more money than I'm used to spending and that's just the beginning of what I'll need for the quilt. I'll want it king-sized and Bali backing ... the $ amount keeps adding up. I'm just grateful that we can still afford such things as groceries and utilities and gasoline.