*Excludes Observations that spanned multiple years

Pre 197053
19700
19711
19721
19730
19744
19751
19760
19772
19785
19790
19803
19813
19821
19834
19844
19854
19862
19871
19882
19899
19904
199114
199216
199323
19949
199513
199610
19979
19983
19995
20005
200116
20022
20033
20045
20054
20063
20078
200810
20099
201016
201121
201210
20136
20147
20155
201617
201715
201812
20198
20204
20216
20225
20232
20246
Total411