*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19870
19880
19892
19900
19910
19921
19931
19941
19950
19961
199710
19981
19990
20000
20010
20020
20030
20040
20050
20060
20071
20080
20092
20101
20111
20121
20132
20142
20150
20162
20170
20185
20190
20200
20210
20220
20230
20240
Total35