*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979000000
1980001001
1981001001
1982001001
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991000000
1992000000
1993000000
1994000000
1995001001
1996000000
1997001001
1998000000
1999002002
2000000000
2001001001
2002002002
2003001001
2004000000
2005000000
2006000000
2007005005
2008002002
2009001001
2010001001
2011001001
2012000000
2013000000
2014001001
2015001001
2016000000
2017000000
Total00250025