*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000011
1970000000
1971000000
1972000000
1973000011
1974000000
1975000000
1976000000
1977000000
1978001001
1979000000
1980000011
1981004004
1982004004
1983003003
1984002013
1985000000
1986000000
1987001001
1988000000
1989000011
1990000000
1991005005
1992002013
1993004026
1994000022
1995002024
1996003025
1997001012
1998000011
1999006039
2000008019
2001008008
2002007018
2003002024
2004002035
2005001034
20060080210
2007002057
20080061310
200900220325
201000590362
201100850388
201200610768
201300320537
2014001023
2015000011
2016000022
2017000022
2018001001
2019000000
2020001001
Total00344167412