*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19890
19900
19910
19921
19932
19942
19950
19960
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20074
20080
20091
20108
20111
20120
20134
20141
20150
20160
20170
20181
20190
20200
20210
20221
20230
20241
Total29