*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19733
19741
19752
19760
19770
19781
19791
19800
19810
19821
19830
19844
19853
19860
19870
19880
19891
19900
19911
19920
19933
19941
19950
19960
19970
19980
19991
20000
20011
20020
20030
20042
20050
20062
20070
20080
20090
201012
20115
20121
20136
20143
20150
201610
20172
20183
201939
202020
202120
202216
202315
20240
Total180