*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19771
19780
19791
19800
19811
19820
19830
19840
19850
19860
19870
198817
19890
19900
19910
19921
19933
19940
19957
19960
19971
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20084
20091
20102
20116
20120
20130
20140
20150
20160
20170
20180
20192
20201
20212
20223
20233
20240
Total56