*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19801
19810
19821
19830
19840
19850
19860
19870
19880
19890
19901
19910
19920
19930
19942
19950
19960
19970
19984
19990
20002
20012
20020
20031
20040
20050
20061
20071
20080
20090
20102
20112
20121
20132
20140
20150
20160
20170
20183
20191
20205
202113
20227
20233
20244
Total61