*Excludes Observations that spanned multiple years

Pre 197023
19700
19710
19720
19736
19740
19750
19760
19770
19782
19791
19801
19810
19822
19831
19840
19851
19860
19870
19880
19891
19901
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20081
20090
20100
20110
20120
20130
20140
20158
20160
201726
20186
201969
202049
202147
202250
202332
20243
Total330