*Excludes Observations that spanned multiple years

Pre 19707
197022
197113
19729
19731
197417
197512
19765
19773
19785
197995
198061
198138
198259
198322
198421
198530
19863
19878
198842
1989214
1990264
199181
199242
199373
199457
199564
199661
199753
199847
199973
200090
200186
2002104
200349
200424
200523
200624
200730
200838
200975
2010131
2011126
201296
2013381
201457
201599
201687
201730
201832
201969
202028
202128
202297
202349
20240
Total3355