*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970003003
1970000000
1971000000
1972000000
1973001001
1974000000
1975000000
1976000000
1977002002
1978002002
1979000000
1980001001
1981000000
1982000000
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991001001
1992001001
1993000000
1994001001
1995002002
1996001001
1997001001
1998002002
1999001001
2000000000
2001000000
2002002002
2003001001
2004003003
2005003003
2006000000
2007002002
2008012003
2009000000
2010002002
2011001001
2012000000
2013000000
2014000000
2015000000
2016000000
2017000000
Total01350036