*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19860
19870
19880
19890
19901
19910
19920
19930
19940
19950
19960
19971
19980
19990
20002
20010
20020
20030
20040
20050
20060
20070
20080
20090
201011
201119
20120
20131
20140
20151
20160
20171
20183
201914
20208
20212
20226
20235
20240
Total76