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*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19752
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19860
19872
19880
19890
19901
19910
19921
19931
19941
19953
19962
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20111
20120
20132
20141
20150
20161
20170
20180
20192
20200
20210
20221
20231
20240
Total23