*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19762
19770
19780
19790
19800
19810
19820
19836
19840
19852
198611
19870
19880
19890
19901
19910
19921
19931
19942
199512
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20081
20091
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20211
20220
20231
20240
Total42