*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19884
19891
19900
19914
19922
19938
19941
19951
19960
19970
19980
19991
20000
20011
20020
20030
20040
20050
20060
20070
20080
20090
20103
20113
20121
20130
20142
20152
20167
20176
20180
20192
20200
20211
20220
20230
20240
Total51