*Excludes Observations that spanned multiple years

Pre 19708
19700
19712
19720
19730
19740
19750
19760
19771
19780
19791
19801
19810
19820
19830
19840
19856
198611
198728
1988105
198919
199011
199167
199286
1993146
1994133
1995182
199635
199744
199861
199936
200017
200197
200254
200334
200460
200556
200626
200734
200828
200935
201022
201143
201223
201327
201432
201528
201632
201731
201841
201928
202022
202129
202233
Total1815