*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970000000
1971000000
1972001001
1973000000
1974000000
1975000000
1976102003
1977001001
1978002002
1979011002
1980014005
1981001001
1982002002
1983000000
1984001012
1985001001
1986012003
1987023005
1988005005
1989026008
1990001001
1991413008
1992033006
1993015006
1994015006
1995006006
1996014005
1997027009
1998032005
1999006006
2000004004
2001102003
200201240025
200304420046
200404320036
2005017140031
200603190022
2007210180030
200802170019
2009013110024
2010015210036
201105130018
2012177150093
201322290033
2014432410077
201527120021
201600510051
2017000000
2018010001
Total1721244001670