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*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
19721
19730
19740
19751
19760
19770
19781
19790
19800
19811
19820
19835
19840
19850
19861
19871
19889
19890
19901
19914
19921
19936
19941
19955
19962
19970
19980
19992
20000
20010
20020
20031
20040
20050
20060
20070
20080
20092
20103
20110
20121
20131
20141
20151
20160
20171
20182
20190
20201
20211
20220
20231
20240
Total60