I got $230 in assorted $1 coins, and here's what I found:
Mintmarks:
P = 163 (71.2%)
D = 59 (25.8%)
S = 7 (3.1%)
Series:
Susan B Anthony = 29 (12.7%)
Sacagawea = 55 (24.0%)
Presidents = 128 (55.5%)
Native American = 18 (7.9%)
Years:
1979 = 25 (10.9%)
1980 = 4 (1.7%)
2000 = 46 (20.0%)
2001 = 9 (3.9%)
2007 = 62 (27.0%)
2008 = 25 (10.9%)
2009 = 30 (13.0%)
2010 = 16 (7.0%)
2011 = 13 (5.7%)
(I also found a 1980-S proof, a 2008-D Sacagawea, and Truman, Nixon and Reagan dollars, but did not include them in the above statistics).