*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19741
19750
19760
19770
19780
19790
19800
19810
19821
19834
19841
19852
19860
19870
19880
19891
19900
19912
19920
19930
19941
19957
19963
19970
19982
19994
20002
20012
20026
20030
20040
20050
20060
20070
20080
20090
20100
201113
20123
20132
20144
20152
20160
20172
20184
20190
20201
20215
20221
20232
20245
Total84