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*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
19910
19920
19930
19941
19950
19960
19970
19980
19990
20000
20010
20020
20033
20040
20052
20060
20070
20080
20090
20102
20110
20120
20133
20145
20150
20160
20173
20180
20190
20200
20212
20221
20230
20240
Total24