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*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19752
19761
19770
19781
19790
19802
19810
19821
19831
19841
19850
19860
19872
19880
19892
19900
19910
19921
19932
19941
19950
19964
19970
19980
19990
20002
20011
20020
20030
20040
20050
20060
20070
20080
20090
20100
20111
20120
20130
20141
20150
20161
20171
20181
20190
20200
20210
20221
20232
20240
Total33