*Excludes Observations that spanned multiple years

Pre 197025
19700
19711
19721
19731
19740
19750
19763
19770
19780
19790
19800
19810
19822
19830
19841
19851
19863
19870
19882
19890
19900
19910
19920
19931
19941
199530
19961
19973
19980
19992
20002
20010
20022
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20131
20141
20150
20160
20170
20181
20190
20200
Total85