*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19921
199310
19941
19950
19960
19974
19980
19990
20002
20010
20020
20031
200431
20051
20060
20070
20083
20090
20105
20116
20120
20130
20140
20150
20160
20170
20180
20191
20200
20210
20220
20230
20240
Total66