*Excludes Observations that spanned multiple years

Pre 1970657
1970120
197111
197228
197312
19748
197549
197616
197759
197854
197943
1980117
198111
198215
19836
19843
19858
19865
19872
19883
19891
19905
19915
199212
199318
199419
199516
199614
199713
199814
199934
200011
200112
2002245
2003335
20041789
2005483
2006501
2007150
2008220
2009613
2010368
2011142
2012101
201399
201426
201530
20161
201737
201848
201910
20201
Total6600