*Excludes Observations that spanned multiple years

Pre 197042
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
19964
199726
199821
19999
200010
200111
200217
200313
200430
200544
200617
200710
200827
200932
201037
201152
2012102
201333
201430
201539
20167
20174
Total692