*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19741
19753
19760
19772
19783
19791
19802
19810
19822
19835
19841
19850
19861
19870
19880
19897
19902
19910
19920
19931
19944
19950
19962
19971
19986
19996
20001
20012
20020
20030
20040
20050
20060
20070
20082
20092
20102
20114
20123
20134
20143
20152
20163
20173
20183
20190
20200
Total86