*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19865
19871
198816
19891
19902
19912
19926
19932
19944
199510
19962
19971
19980
19995
200014
20012
20020
20030
20042
20053
20062
20072
20088
20099
20100
20110
20120
20132
20142
20151
20162
20170
20180
20190
20204
20211
20225
20238
20240
Total124