*Excludes Observations that spanned multiple years

Pre 197010
19701
19710
19721
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19833
19841
19852
19860
19870
19883
19890
19900
19911
19921
199319
19943
199523
19960
19970
19981
19990
20000
20010
20021
20030
20040
20050
20060
20072
20086
20090
20100
20111
20120
20130
20140
20150
20160
20170
20182
20192
20202
20212
20225
20230
Total93