*Excludes Observations that spanned multiple years

Pre 197021
19700
19710
19720
19730
19743
19751
19763
19770
19783
19790
19800
19811
19822
19832
19841
19850
19863
19871
19880
19891
19901
19910
19923
19933
19940
199510
19965
19970
19981
19996
20000
20012
20020
20030
20040
20051
20061
20078
20088
20094
20103
20113
20120
20132
20141
20150
20161
20172
20180
20191
20200
20211
20220
Total109