$900 in small dollars today yielded
16 proofs!
1999-P SBA (Wow! First P-mint proof I've ever found)
2000-S Sac
2003-S Sac
2005-S Sac
2006-S Sac (x2)
2008-S Sac
2007-S Pres (Adams)
2007-S Pres (Jefferson)
2008-S Pres (JQ Adams)
2008-S Pres (WH Harrison)
2009-S Pres (Tyler)
2009-S Pres (Polk)
2013-S Pres (McKinley)
2014-S Pres (Harding)
2014-S Pres (Coolidge)
Also noticed that presidential proofs decrease in mintage each year, meaning the NIFC's are a tougher find than the IFC's, with the Bush proofs being the rarest.