*Excludes Observations that spanned multiple years

Pre 197014
19707
19712
19722
19733
19743
19754
19762
19772
19783
19795
19805
19819
19827
198313
198428
198521
198633
198735
198837
198942
199047
199143
199250
199341
199440
199567
199662
199740
199856
199965
200056
200169
200277
200370
200452
200561
200642
200751
200876
200950
201046
201120
201216
201320
201420
201517
20161
20170
20180
Total1532