*Excludes Observations that spanned multiple years

Pre 197010
19701
19710
19720
19730
19740
19751
19760
19772
19781
19790
19803
19812
19824
19832
19841
19851
19860
19870
19880
19891
19901
19912
19921
19932
19942
19950
19960
19970
19981
19991
20003
20014
20020
20034
20040
20050
20060
20071
20081
20092
20100
20111
20122
20135
20143
20151
20160
20170
20181
20190
20200
20210
20220
Total67