*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19810
19821
19831
19841
19850
19861
19870
19880
19890
19900
199111
19922
19933
19942
19950
19960
19971
19980
19992
20000
20010
20020
20030
20040
20052
20060
20070
20081
20091
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
202052
20210
20220
20231
20240
Total83