*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19792
19800
19810
19821
19830
19840
19851
19860
19870
198812
19890
19900
19910
19921
19930
19940
19954
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20063
20070
20080
20090
20103
201122
20121
20130
20140
20150
20160
20172
20183
201927
202012
202113
202220
20230
20240
Total127