*Excludes Observations that spanned multiple years

Pre 197018
19701
19710
19721
19730
19740
19750
19760
19772
19780
19792
19800
19811
19821
19832
19840
19850
19860
19870
19880
19899
19901
19914
19920
19930
19944
19953
19962
19970
19980
19991
20004
2001101
20026
20030
20040
20051
20064
200714
20087
2009127
201030
20115
201210
20133
201430
20153
201612
20174
20184
20196
202015
20212
20220
Total440