*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19733
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19873
19880
19890
19900
19910
19920
19932
19940
19951
19961
19970
19983
19992
20000
20015
20020
20030
20040
20050
20060
20070
20083
20090
201019
201118
20128
201318
2014126
201541
201684
20175
201852
201958
202084
202163
202280
202384
202416
Total781