*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19782
19790
19800
19811
19821
19830
19841
19851
19862
19870
19880
19893
19901
19911
19920
19931
19942
19951
19961
19970
19980
19990
20000
20010
20022
20030
20040
20050
20060
20070
20081
20091
20103
20116
20124
20130
20141
20150
20162
20171
20182
20192
20204
20214
20221
20236
20242
Total61