*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979001001
1980002002
1981001001
1982000000
1983000000
1984000000
1985000000
1986000000
1987001001
1988001001
1989010001
1990010001
1991001001
1992001001
1993010001
1994032005
1995001001
1996040004
1997020002
1998030003
1999011002
2000032005
2001033006
2002025007
200303100013
2004042006
20050550010
2006043007
20070950014
2008034007
20090190010
201001110012
201100210021
2012090009
201301170018
20140930012
2015002002
2016001001
2017000000
Total08310500188