go to following link: http://amc-reg.maa.org/Reports/GeneralReports.aspx
you find lots of helpful information from there.
1. You choose a contest from there. You can find:
AMC 10/12 02/05/2013
AMC 8 11/13/2012
AIME II 03/28/2012
AIME 03/15/2012
AMC 10/12 B 02/22/2012
AMC 10/12 A 02/07/2012
AMC 8 11/15/2011
AIME II 03/30/2011
AIME 03/17/2011
AMC 10/12 B 02/23/2011
AMC 10/12 A 02/08/2011
AMC 8 11/16/2010
2. After you choose a contest /sometime, you need to choose a sub contest for AMC 10 or AMC 12.
Then you can choose the location: (You can choose the countries or the states of US)
3. Then you can choose different reports:
( contest score report distribution graph,
achievement roll
contest score gender report with percentile graph
contest score grade report with percentile graph,
contest score team report,
distinguish honor roll,
gender and grade average,
honor roll,
item difficulty
perfect scores )
For example, you can find the report: AMC 10a, 2/05/2013, Virginia, distinguish honor roll: total 32 students
honor rolls: 52.
So totally, there are 32 + 52 = 84 students qualified for AIME through AMC 10a test in Virginia in 2013.