*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970110124027
1970000000
1971100001
1972000000
1973100001
1974000000
1975000101
1976100102
1977002204
19781045111
1979102010132
198020712021
198110154323
198200207835
19831013471071
19840022351370
198500718116141
1986003133652
1987001634353
1988103536274
198900024226
1990102216746
1991003940281
19924069478128
199300208411115
199400237542140
199500925337
199600861978
199700459716158
199851148912121
199930119014118
200020409028160
2001104048493
200221562676
2003002558285
20040011471169
200520938453
2006202045370
200700463370
200820954671
200910350458
201030872184
2011107857100
2012201016331
2013101221236
201410516022
2015001325139
2016101413028
201700310114
2018000000
Total55267416904052826