*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19862
19870
19888
19891
19900
19911
19921
19931
19940
19950
19961
19970
19981
19993
20001
20010
20023
20030
20040
20050
20061
20070
20080
20091
201022
20114
20122
20131
20142
20150
20161
20171
20180
20192
20200
20210
20222
20230
20240
Total62