*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19879
19880
19895
19900
19910
19923
19932
19940
199539
19960
19971
19980
19990
20000
20015
20022
20030
20040
20052
20062
20071
20085
20091
20100
20110
20120
20130
20141
20150
20160
20170
Total78