*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19731
19740
19750
19760
19770
19781
19790
19800
19810
19822
19830
19840
19853
19860
19875
19882
19892
19902
19910
19920
19930
19940
19951
19960
19974
19983
19991
20000
20012
20020
20030
20040
20051
20060
200711
20084
20091
20105
20112
20121
201319
20145
201518
201648
20171
20183
201945
202037
202143
202247
202350
20241
Total372