*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
20065
200714
20088
2009127
201030
20115
201211
20133
201430
20153
201613
20175
20184
201910
202017
20216
20222
20233
20249
Total469