*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973001001
1974001001
1975000000
1976000000
1977000000
1978000000
1979002002
1980000000
1981002002
1982002002
1983000000
1984000000
1985001001
1986002002
1987001001
1988001001
1989001001
1990000000
1991000000
1992003003
1993001001
1994005005
199500100010
1996004004
199700110011
1998002002
1999006006
2000003003
2001008008
200200180018
2003005005
2004009009
2005005005
2006003003
2007009009
200800170017
2009006006
2010009009
201100250025
2012008008
201300130013
201400230023
201500160016
201600240024
201700360036
201800350035
201900360036
202000550055
202100490049
202200370037
2023000000
Total0050500505