*Excludes Observations that spanned multiple years

Pre 197045
19700
19710
19720
19730
19743
19750
19762
19771
19783
19790
19802
19810
19820
19831
19843
19851
19867
19872
19880
19890
19902
19911
19924
19930
19941
19951
19963
19978
19981
19991
20002
20011
20020
20030
20040
20050
20062
20073
20085
20098
201051
201116
20121
20132
20143
20151
20161
20171
20181
20190
Total190