*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19891
19901
19911
19921
199314
19944
19956
19961
19970
19980
19993
20003
20013
20028
20036
20041
20050
20069
20070
20080
20092
20106
20116
20124
20131
20141
20150
20166
20171
20183
201910
202026
202143
202232
20235
20242
Total212