*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19863
19870
19880
19891
19900
19910
19926
19933
19940
19950
19960
19973
19980
19990
20000
20010
20020
20030
200430
20053
20060
20072
20088
20091
20100
20111
20120
20130
20143
20150
20160
20170
Total65