*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197031003135
1970200406
1971700108
1972600107
1973200305
1974200204
19756004010
1976400408
19777005012
1978500207
19798002010
19808003011
19818002010
19829006015
19839002011
19848006014
198513003016
1986110210225
198790023234
1988140027041
1989150030247
1990131062242
1991902161239
199213142384125
1993190378526626
1994181017418702063
1995182315418552032
1996131210726912814
1997171063542623
199817131412021237
1999121015198226
200023117117831879
2001261034855916
20021310419791034
2003100243529584
200419012911001149
2005170047214278
2006191051282353
20071904919721086
20081501126710852
2009800139137284
2010902319450780
20111002244334590
2012252087443557
2013101468136606
201410017651228
201520036442
201600061925
2017000336
2018000000
Total550153328041801021412