*Excludes Observations that spanned multiple years

Pre 197026
19702
19713
19720
19730
19740
19752
19760
19773
19780
19791
19800
19810
19820
19830
19841
19858
198628
198746
1988101
198934
19903
199131
199229
1993139
1994141
1995105
199683
199726
19982
19996
200019
200118
200210
200322
200413
200528
200611
200712
200815
200918
201019
201115
201220
201317
201417
201521
201613
201711
20182
20197
20204
202111
20228
20236
20241
Total1158