*Excludes Observations that spanned multiple years

Pre 197094
19701
19712
19721
19733
19743
19759
19763
19776
197813
19793
198037
19810
19824
19832
19840
19851
19860
19871
19880
19891
19900
19911
19921
19937
199420
19957
19961
19970
19982
19995
20001
20011
200212
20032
200421
200544
200638
200710
200811
200950
201038
201121
20123
20132
20141
20152
20160
20170
Total485