*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19878
19880
19891
19900
19914
19922
19935
19941
19953
19961
199713
19980
19995
20003
20017
20021
20030
20042
20050
20060
20070
20080
20090
20100
20111
20120
20131
20140
20150
20160
20170
20180
20190
20202
20212
20221
Total65