It's about a medium sized con
0-2,000 being small
2,000-6,500 being medium
6,500-15,000 being large
It had about the same number of attendies on it's first year as Otakon and Anime Expo had their "fourth" year. The next Otakon/Anime Expo?....most likely not. But It's still a pretty large con for it's age.
Makes you feel sorry for the mother
*edit* I have a spreadsheet with most every con in the US's attendence rate, but it has a disclaimer from the creator not to "re-distribute" in any way...
"This data is collected for non-commercial purposes. The collection of this data is a time-consuming process. Please do not re-distribute this data in any form for any purpose without my express written permission."
but if you want....you can ask the creator for it...
"This data was last updated on June 9, 2004. For the latest version, please contact me.