*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19842
19851
19862
19871
19880
19891
19900
19911
19920
19932
199413
19958
19961
19971
19980
19990
20000
20010
20023
20038
20041
20050
20060
20070
20084
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20213
20220
20231
20240
Total53