*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19854
19867
19870
19880
198916
19901
19910
19922
19932
19941
19952
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20112
20120
20130
20141
20150
20160
20170
20182
20190
20201
20210
20222
20232
20240
Total46