*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19893
19900
199191
199242
199338
19941
19951
19961
19970
19980
19990
20000
20010
20020
20030
20040
20050
20061
20070
20080
20091
20102
20113
20120
20133
20140
20151
20160
20171
20182
20193
20200
20210
20220
20230
20240
Total195