*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001023
1970000000
1971000000
1972000000
1973000022
1974000000
1975000022
1976000011
1977000011
1978000011
1979000033
1980000000
1981001001
1982001001
1983000011
1984001012
1985000033
1986001012
1987002035
1988001001
1989004004
1990005038
1991007018
1992004004
1993005049
199400110314
199500142319
199600100212
1997002013
1998007029
1999003058
20000060410
200100170118
200200121114
2003009009
200400100010
2005004037
20060070411
2007005027
2008004004
2009008109
2010004015
201100180119
20120090312
201300100010
2014004004
2015003003
2016000000
2017000000
Total00210465279