*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19760
19771
19789
19790
19801
19810
19820
19830
19840
19851
19861
19871
19883
19891
19900
19910
19920
19930
19941
19950
19961
19972
19980
19992
20000
20010
20020
20030
20040
20052
20060
20070
20080
20090
20100
20110
20122
20133
20140
20152
20160
20170
20185
20194
20205
20212
20220
20230
20240
Total54