*Excludes Observations that spanned multiple years

Pre 197099
19700
19710
19720
19730
19740
19752
19760
19771
19780
19790
19801
19810
19820
19830
19842
19852
198620
198715
198838
198922
199022
199132
199222
199341
199436
199569
199627
199736
199811
199915
200016
200113
20023
2003105
200496
200555
200672
200773
200896
200988
201090
201173
2012100
2013131
201489
201569
201685
201770
201888
201966
202034
202164
202263
202313
20244
Total2169