*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19821
19830
19840
19850
19860
19870
19880
19890
19900
199117
19921
19931
19948
19950
19960
19970
19980
19996
20001
20011
20020
20030
20040
20050
20060
20070
20082
20091
20101
20110
20120
20130
20140
20150
20160
20171
20181
20190
202087
20215
20222
20232
20240
Total139