*Excludes Observations that spanned multiple years

Pre 19702
19700
19711
19721
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19860
19871
19882
19890
19900
19912
19920
19930
19940
19950
19960
19970
19980
19990
20007
20011
20020
20030
20040
20050
20060
20070
20083
20092
20100
20113
20120
20130
20140
20150
20160
20171
20180
20190
20200
20211
20220
20232
20240
Total30