*Excludes Observations that spanned multiple years

Pre 19708
19700
19710
19721
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19866
19871
19881
19891
19900
19915
19920
19930
19942
19950
19960
19970
19980
19990
20001
20010
20020
20030
20040
20050
20060
200711
20084
20091
20101
20110
20120
20134
20140
20151
20161
20171
20180
20190
20202
20210
20220
20231
20240
Total54