*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000303
1970000000
1971000000
1972000000
1973000000
1974000202
1975000000
1976000000
1977000101
1978000101
1979000000
1980000101
1981000101
1982000000
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991000000
1992000000
1993000101
1994000202
1995000101
1996000101
1997000000
1998000202
1999000101
2000000101
2001000303
2002000101
2003000202
2004000202
2005000303
2006000101
2007000101
2008000000
2009000000
2010000505
2011000808
2012000000
2013000000
2014000000
2015000000
2016000000
2017000000
2018000000
Total00044044