*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970012014
1970011002
1971020002
1972000000
1973020002
1974000000
1975002002
1976002002
1977012003
1978051006
1979061007
1980143008
1981133007
1982041005
1983002002
1984002002
1985002002
1986023005
1987016007
1988041005
19890370010
199001230015
19916540015
199221070120
1993015130028
1994428150047
19951015160041
1996521270053
199728692200119
1998655110072
1999442280074
20003738210096
2001638140159
2002240320074
2003439150058
2004453300087
2005439260069
2006242310075
2007134300065
2008120300051
2009427470078
2010121490071
2011114430058
2012020160036
201308420050
2014011310042
2015013260039
201600250025
2017008008
2018041005
Total134772704031613