*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000140216
1970004004
1971001001
1972000000
1973000000
1974001001
1975000000
1976000000
1977000011
1978000000
1979000000
1980001001
1981001001
1982001001
1983001001
1984000000
1985000000
1986000000
1987000000
1988000011
1989002002
1990001001
1991003003
1992002013
1993002013
1994002035
19950070411
1996003014
1997004004
1998000011
1999000033
2000007018
2001002013
2002002002
2003001067
2004004026
2005000011
2006003025
20070080311
2008003014
2009004015
2010001102
2011004026
2012001012
2013001001
2014001001
2015000000
2016000000
2017000000
Total0092139132