*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19744
19751
19760
19771
19780
19791
19800
19812
19822
19832
19840
19851
19861
19870
19880
19891
19900
19911
19920
19930
19942
19951
19961
19970
19980
19990
20000
20011
20020
20030
20040
20050
20061
20070
20080
20090
20100
20111
20120
20130
20140
20150
20160
20170
20180
20190
20201
20210
20220
20230
Total27