No chart image found

*Excludes Observations that spanned multiple years

Pre 19702
19700
19711
197231
197311
19740
19750
19760
19772
19781
19790
19801
19811
19820
19830
198428
198583
1986140
1987231
1988372
198980
199033
1991262
1992105
1993389
1994252
1995267
1996153
199795
199815
199991
200088
200166
200248
200353
200456
200562
200644
200745
200859
200952
201056
201158
201264
201364
201475
201570
201662
201747
20182
20190
20200
20210
Total3717