*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19836
19843
19853
19861
19870
19884
19895
19902
19912
19921
19935
19941
19954
19961
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20070
20084
20091
20100
20111
20120
20130
20140
20150
20160
20170
20180
20190
20200
20211
20220
20230
20240
Total47