*Excludes Observations that spanned multiple years

Pre 197049
19701
19710
19722
19732
19740
19751
19762
19773
19782
19791
19801
19810
19821
19832
19840
19850
19860
19870
19880
19890
19901
19913
19922
19931
19941
19950
19964
19971
19981
19991
20001
20010
20024
20030
20040
20050
20068
20071
20081
20092
20105
20113
201211
20135
20144
20155
20166
20171
Total139