*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977001001
1978000000
1979000000
1980000000
1981000000
1982000000
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991000000
1992000000
1993000000
1994000000
1995002002
1996110002
1997010001
1998000000
1999110002
2000200002
2001300003
2002043007
2003131005
2004131005
2005011002
2006030003
2007003003
2008002002
2009001001
2010000000
2011013004
2012012003
2013041005
201401040014
201542650035
201631620021
201701430017
201851440023
201913380042
2020200002
2021000000
2022000000
Total241364700207