*Excludes Observations that spanned multiple years

Pre 197090
197010
19715
19725
19733
19742
19752
19760
19773
19782
197912
198012
19816
19822
19839
19849
19856
19862
19871
19884
19895
19903
19914
19924
199321
199413
199515
199613
199712
199811
199916
200020
200113
200215
200313
200411
200517
200613
20079
200821
200913
201020
201123
201217
201311
201412
201513
201610
20177
201813
201917
202019
202112
202218
20236
20241
Total646