*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000407680
1970020046
1971010089
1972010067
1973010067
1974012047
19750020810
1976011079
19770410914
19780110911
19790120912
198001201215
1981010089
198202301217
198301201114
198402201317
198502101013
198605501424
198705401524
1988010401630
1989031801352
199015501122
19912171611450
19924201401149
19931641101490
1994156319020603
1995358615217623
1996147815114509
19971422101781
1998136514013393
19990241001448
2000340634121465
2001125322019295
2002142635112475
2003020027013240
2004045115116483
20050382912088
2006024737118303
2007319139021254
200815758022138
2009016246112221
2010413797011249
20112182203044431
2012011654124195
2013015611708281
2014070200393
2015016190338
2016032170049
201702160220
201804120218
Total3053831081116867191