*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19815
19820
19830
19840
19851
19867
19874
19882
19891
19904
19912
19921
19932
19941
19951
19960
19976
19987
19992
200057
200111
200216
200347
200467
200573
200691
200750
200851
200972
201074
201164
201234
20130
20141
20150
20160
20170
Total755