*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970000000
1971000000
1972001001
1973000000
1974000000
1975000000
1976001001
1977002002
1978000000
1979000000
1980000000
1981000000
1982000000
1983000000
1984000000
1985000000
1986002002
1987000000
1988001001
1989001001
1990006006
1991004004
1992003003
1993000000
1994004004
1995004004
1996002002
1997002002
1998003003
1999001001
2000006006
2001008008
2002003003
2003005005
2004005005
2005005005
2006002002
2007003003
2008003003
2009003003
2010003003
2011007007
2012000000
2013000000
2014001001
2015001001
2016000000
2017000000
Total00930093