*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
199110
199216
199325
19945
19958
19964
19975
19981
19990
20000
20010
20020
20030
20040
20050
20061
20070
20080
20090
20104
20117
20120
20130
20140
20150
20160
20170
20182
20196
20203
20211
20226
20234
20240
Total109