*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19872
19880
19891
19900
19910
19920
19932
19942
19950
19960
19970
19980
19990
20000
20010
20020
20035
20042
20050
20060
20072
20080
20091
20100
20110
20122
20130
20144
20150
20162
20175
20180
20190
20200
20212
20220
20231
20240
Total34