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*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
19721
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19844
19850
19866
198725
198896
19892
19902
199118
199244
199325
19945
199514
19964
19973
19981
19993
20000
20017
200218
20033
20044
20051
20061
20071
20084
20090
201016
20117
20120
20130
20142
20155
20161
20171
20186
201923
20200
20210
Total355