*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19844
19851
19860
19872
19881
19891
19900
19910
19922
19933
19940
19950
19965
19978
19980
19990
20000
20010
20020
20031
20040
20052
20060
20070
20080
20091
20101
20113
20121
20130
20140
20150
20161
20170
20181
20190
20200
20210
20220
20230
20240
Total39