*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19931
19940
19953
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20084
20090
20100
20110
20122
20130
20141
20151
20160
20170
20182
201911
202010
20211
202210
20239
20240
Total57