*Excludes Observations that spanned multiple years

Pre 1970255
19702
19716
19722
19733
197421
197515
19763
19777
19786
19790
19801
19811
19821
19831
19844
19850
19863
19871
19880
19891
19901
199166
199222
199385
1994122
1995284
1996214
1997231
1998281
1999270
2000302
2001709
2002639
2003657
2004734
2005220
2006325
2007130
2008169
2009163
2010251
2011114
201276
2013113
201477
201579
201692
201765
201876
201992
202085
202185
202286
202394
202499
Total7441