*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010207780
1970002035
197100001010
1972000077
1973000077
1974002057
1975002079
197600201315
197700501217
197800201214
197901601522
198000301215
198100201820
198200502126
198300301922
198400302124
198500201820
198601902131
1987001302033
1988011302034
1989081801844
19909391651988
19918132201558
19925102601859
199345431021110
1994717058026261
19958401902390
199688146019154
1997227040128341
1998920042121273
1999316131021216
2000322741028299
2001423533032304
2002221861020301
2003228753121364
2004337741019440
2005123877034350
20066239131032408
20075172149333362
20081210205622444
20093109241019372
20103119346021489
2011062492026580
2012088198049335
201333030907349
201401912410144
201517500361
201600460349
2017102003
Total10236863024189367766