*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19751
19760
19770
19780
19791
19800
19810
19820
19831
19841
19850
19860
19870
19881
19896
19900
19912
19921
19930
19940
19954
19960
19972
19980
19991
20001
20011
20020
20032
20040
20051
20062
20071
20081
20090
20107
20117
20122
20133
20141
20154
20166
20176
201819
20199
20204
202116
20224
20230
Total119