Comics For Sale Comics Sales In US From 2001 To 2006 And Its Breakdown?

Comics sales in US from 2001 to 2006 and its breakdown? - comics for sale

I tried to find a market for American comics. I'm trying to find their sales in the United States, including that of inventing publishers (Marvel, DC ....) these sales. I was one years sales of comics in 2007 was $ 310M, but I think that the distribution of sales and the difficulty of the data. Does anyone know about this?