*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010110416
1970000000
1971002002
1972002002
1973003014
1974003014
1975004026
1976002024
197700150217
1978004004
197910110113
19800090110
198101110012
198200170219
1983008008
1984002024
19850760215
198607130121
198703130016
19881780319
198926120222
1990317240044
19911614280159
1992111180232
1993514440063
1994126440071
1995211480061
1996729280064
1997228630194
1998324620190
199918380249
200037550065
200127520162
200213870091
200355880199
20044119901115
20053514400152
20069512301138
20073613100140
20085514402156
20092322101227
20108317800189
201110924401264
201271231700336
20138742000435
201471148700505
201551465000669
201610783000847
2017151284600873
20181291023001044
20191371119001139
2020000000
2021000000
Total17836178110418391