*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19750
19760
19770
19780
19790
19801
19810
19821
19830
19842
19850
19860
19870
19881
19891
199013
199124
199220
199323
199410
19954
19961
19971
19980
19990
20000
20010
20020
20030
20040
20050
20060
20071
20083
20091
20100
20110
20128
20134
20140
20150
20160
20170
20181
20191
20205
20212
20220
20235
20240
Total134