*Excludes Observations that spanned multiple years

Pre 19704
19700
19711
19721
19731
19740
19750
19762
19772
19786
19790
19800
19810
19820
19830
19842
19851
19869
19879
198820
19892
199010
19915
19929
199313
199410
199514
19965
19976
19983
199916
20003
20011
20021
20039
200410
20053
20067
20078
20086
200914
201012
201110
201227
201328
201413
201519
20167
20176
20187
201912
202013
202118
202215
20235
20246
Total411