*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19740
19750
19760
19770
19781
19792
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19911
19920
19930
19942
19953
19960
19970
19980
19991
20000
20013
20020
20030
20040
20050
20061
20070
20080
20090
201013
20111
20121
20130
20141
20151
20161
20171
20180
20191
20200
20211
20220
20232
20241
Total41