I believe they are selling roughly 10,000 S2000s per year in the United States. (Exact figure for the 2002 calendar year was 9,684, for 2001 was 9,682.)
They are selling around 200 NSXs per year in the States these days. (Corresponding figures are 233 for calendar 2002 and 182 for 2001.)
I believe they sell something on the order of 30,000 Corvettes each year. I'm sure someone can provide an accurate number...