*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19882
19890
199017
19915
19922
19933
19941
19958
19960
19971
19980
19992
20002
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20123
20133
20141
20150
20164
20170
20180
20190
20200
20212
20220
20231
20240
Total57