*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19851
19860
19870
19880
19890
19900
19910
19920
19930
19940
19951
19960
19970
19980
19990
20001
20011
20020
20030
20040
20050
20061
20070
20082
20091
20102
20115
20121
20130
20140
20151
20161
20170
20186
20196
20208
20214
20224
20239
20240
Total56