*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19750
19760
19770
19780
19790
19800
19812
19821
19830
19840
19851
19860
19870
19880
19891
19900
19910
19920
19930
19940
19955
19960
19970
19980
19991
20000
20010
20020
20030
20040
20050
20061
20070
20080
20090
20103
201112
20121
20131
20140
20150
20163
20175
20186
201911
202017
20210
20220
Total72