*Excludes Observations that spanned multiple years

Pre 197030
19701
19711
19720
19732
19740
19753
19763
19770
19780
19794
198012
19813
19822
19830
19840
19850
19860
19870
19880
19891
19901
19910
19921
19930
19940
19950
19961
19973
19980
19993
20003
20010
200212
200314
20048
20059
20060
20070
20087
20093
20103
20110
20120
20137
20140
20159
20160
20170
Total146