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*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19741
19750
19760
19771
19781
19790
19800
19810
19820
19830
19840
19851
19860
19870
19880
19890
19900
19912
19921
19930
19941
19951
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20072
20082
20091
20101
20110
20121
20130
20140
20150
20161
20170
20180
20190
20201
20210
20224
20232
20240
Total25