*Excludes Observations that spanned multiple years

Pre 19708
19700
19710
19720
19730
19740
19752
19760
19770
19780
19790
19800
19811
19821
19830
19840
19854
19860
19870
19880
19892
19901
19913
19920
19930
19940
19950
19962
19970
19981
19993
20001
20015
20020
20030
20040
20051
20060
20070
20080
20091
20101
20116
20124
20139
20141
201525
201627
201711
201828
20192
20203
20210
20220
Total153