*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970021003
1970001001
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979000000
1980000000
1981000000
1982000000
1983001001
1984001001
1985000000
1986005005
1987003003
1988112004
1989011002
1990011002
1991101002
1992134008
1993233008
199454110020
1995123006
1996153009
1997111003
1998053008
199911040015
20003520010
2001120003
2002104005
20032260010
200421230017
2005116008
2006045009
2007419100033
20081390013
200930150018
201045230032
201135250033
2012630009
2013112100023
2014036009
201502140016
2016002002
2017120003
Total5710818900354