*Excludes Observations that spanned multiple years

Pre 197010
19700
19710
19720
19733
19741
19750
19764
19770
19783
19790
19804
19812
19821
19831
19841
19851
19860
19870
19880
19891
19900
19910
19920
19931
19940
19950
19960
19970
19982
19991
20004
20012
20020
20030
20040
20051
20060
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total43