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*Excludes Observations that spanned multiple years

Pre 19700
19700
19713
19720
19730
19740
19751
19760
19771
19780
19790
19800
19812
19820
19830
19842
19850
19860
19870
19884
19891
19904
199151
199216
19930
19942
19951
19964
19970
19980
19990
20003
20014
20020
200343
200424
20058
20066
20070
200825
200913
20100
20110
20122
20130
20140
20151
20160
20170
20180
20191
20200
20210
Total222