*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970004004
1970001001
1971000000
1972000000
1973003003
1974003003
1975000000
1976000000
1977001001
1978000000
1979000000
1980000000
1981001001
1982000000
1983000000
1984000000
1985000000
1986001001
1987000000
1988005005
1989001001
1990000000
1991001001
1992003003
1993001001
1994004004
1995001001
1996002002
1997006006
1998002002
1999006006
2000001001
2001001001
2002003003
2003003003
2004004004
2005004004
2006005005
2007007007
2008004004
2009007007
2010002002
2011003003
2012001001
2013001001
2014000000
2015000000
2016000000
2017000000
Total00920092