*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19875
19881
19890
19901
19911
19920
19930
19940
19958
19960
19970
19980
19992
200017
20011
20022
20030
20040
20051
20062
20070
200813
20097
20104
20112
20121
20132
20143
20154
20163
20177
201811
201924
202015
20217
20229
202314
202416
Total184