*Excludes Observations that spanned multiple years

Pre 197044
19708
19710
19720
19730
19741
19753
19765
19778
19782
19790
19808
19812
19821
198316
19840
19850
19860
19870
19880
19890
19902
19911
19920
19931
19942
19952
19962
19972
19982
19992
20002
20013
20025
200311
200416
200519
20064
20072
20087
20098
20108
20110
20122
201312
20143
20150
20164
20170
Total220