*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19741
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19861
19870
19880
19890
19900
19910
19920
19931
19940
19951
19960
19970
19981
19990
20000
20010
20020
20031
20040
20050
20061
20071
20081
20090
20102
20116
20121
20130
20140
20151
20160
20170
20181
20192
20207
20219
202210
202314
20244
Total68