*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700590014
1970000000
1971061007
1972000000
1973001001
1974012003
1975001001
1976000000
1977002002
1978011002
1979000000
1980001001
1981002002
1982000000
1983100001
1984000000
1985000000
1986000000
1987000000
1988001001
1989001001
1990000000
1991000000
1992002002
1993001001
1994000000
1995003003
1996002002
1997004004
1998005005
1999002002
2000002002
2001005005
2002001001
2003026008
200400100010
200502040024
2006006006
200703140017
2008026008
2009006006
201000130013
201101100011
2012000000
201301020012
2014010001
2015002002
2016000000
2017000000
Total15212800181