*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970008008
1970000000
1971001001
1972001001
1973000000
1974002002
1975003003
1976003003
1977001001
1978001001
1979003003
1980002002
1981000011
1982002002
1983003003
1984101002
1985001001
1986003003
1987003003
1988117009
1989004004
1990102003
1991115007
1992008008
1993104005
199420110013
19952080010
1996008008
1997117009
1998009009
1999004004
20002080010
2001206019
2002304007
2003001001
2004002002
2005014005
2006008008
2007005005
2008005005
2009004004
201010110113
2011106007
2012007007
201300110011
2014006006
201520140016
201600110011
201740120016
201830200023
201910170018
2020000000
2021000000
2022000000
Total29427703313