*Excludes Observations that spanned multiple years

Pre 197044
19705
19710
19722
19730
19741
19752
19762
19774
19783
19792
198011
19812
19821
19831
19843
19853
19861
19870
19880
19892
19902
19918
19922
19934
19947
19957
19965
199726
199821
19999
200010
200111
200217
200314
200430
200544
200617
200711
200828
200933
201039
201154
2012105
201334
201432
201547
201620
201726
201816
201928
20206
20219
20228
20234
20241
Total824