*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19891
19901
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20051
20061
20070
20083
20091
20101
20110
20121
20131
20140
20151
20163
20171
20183
201913
202011
202114
20229
20232
20243
Total72