*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970003003
1970000000
1971000000
1972000000
1973000000
1974001001
1975000000
1976000000
1977001001
1978000000
1979001001
1980001001
1981001001
1982001001
1983000000
1984000000
1985001001
1986000000
1987004004
1988001001
1989004004
1990111003
19910370010
1992003003
1993105006
19947180016
19955270014
199643100017
1997125008
19983070010
1999124007
2000007007
20013190013
200241110016
200326160024
200400160016
200512130016
2006204006
200700170017
200810200021
200961250032
201081340043
201140400044
2012006006
2013006006
2014000000
2015002002
2016003003
2017000000
Total542630500385