*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19862
19870
19880
19890
19900
199166
19920
19934
19940
19950
19960
19970
19980
19992
20000
20010
20020
20030
20040
20050
20060
20070
20083
20094
20100
20110
20120
20130
20140
20150
20160
20175
20182
20197
2020138
20210
20220
20231
20240
Total235