*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
19870
19880
19890
19900
19912
19920
19931
19940
19950
19960
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20071
20080
20090
20102
20110
20120
20132
20140
20150
20160
201713
20183
20198
20201
20210
20223
20232
20240
Total39