*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19702240210
1970002002
1971000000
1972000000
1973001001
1974002002
1975013004
1976005005
1977007007
1978003003
19790370010
19801450010
1981014005
1982016007
1983002002
1984006006
1985012003
1986016007
1987016007
1988015006
1989010140024
199004070047
1991024190043
1992117170035
199321541500171
199445332200559
1995105882500623
199674181400439
19975120219001226
1998128852200919
199906331600649
200018912300915
200128362301862
20020104264001106
20032126052001314
200412149378001583
20055878247001130
200641052168001224
200711065121001187
2008461512200741
2009567714900831
2010191174195001388
20111659825200866
201261097163001266
2013174515000896
201457038000788
2015130320063
20160370010
2017000000
Total1281867921920321002