*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19721
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19841
19850
19860
19871
19880
19890
19903
19911
19920
19931
19944
19950
19962
19970
19980
19991
20000
20010
20020
20030
20042
20050
20060
20070
20086
20093
20100
20110
20123
20130
20141
20150
20160
20170
20180
20190
20200
20211
20221
20230
20240
Total33