*Excludes Observations that spanned multiple years

Pre 197029
19700
19710
19720
19731
19740
19750
19762
19770
19782
19793
19800
19810
19821
19830
19843
19851
19863
19871
19880
19890
19901
19910
19920
19934
19941
19954
19962
19970
19982
19991
20000
20010
20020
20030
20040
20050
20061
20070
20086
20095
20100
20110
20120
20130
20141
20150
20160
20170
20180
20190
20200
20210
20220
Total74