*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197001140015
1970001001
1971000000
1972000000
1973000000
1974000000
1975001001
1976000000
1977000000
1978000000
1979000000
1980001001
1981000000
1982001001
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991000000
1992000000
1993000000
1994001001
1995001001
1996001001
1997003003
1998000000
1999001001
2000000000
2001002002
2002002002
2003003003
2004003003
2005000000
2006000000
2007102003
2008001001
2009001001
2010003003
2011009009
2012002002
2013001001
2014000000
2015001001
2016000000
2017000000
Total11550057