*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970000000
1971000000
1972000000
1973000000
1974001001
1975000000
1976000000
1977100001
1978000000
1979001001
1980001001
1981000000
1982000000
1983000000
1984000000
1985000000
1986010001
1987003014
1988001001
1989001001
1990001001
1991000011
1992000000
1993100001
1994003025
1995011103
1996003003
1997001023
1998002013
1999003003
2000020002
2001012003
2002002002
2003010001
2004000000
2005012003
2006121026
2007010012
2008012003
2009003003
2010002002
2011011002
2012001001
2013001001
2014000000
2015002002
2016001001
2017000000
Total3124311069