*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197011530524
1970000000
1971000022
1972000011
1973000011
1974000000
1975000000
1976000000
1977000022
1978000011
1979000000
1980000000
1981010001
1982001001
1983342009
1984000000
1985000022
1986000011
1987000000
1988010001
1989000000
1990000022
1991001001
1992000011
1993001001
1994001045
1995001012
1996000000
1997001012
1998002013
1999000011
2000000000
2001011002
2002001001
2003020002
2004001012
2005012003
2006003003
2007002103
2008014005
2009003003
2010022004
2011002002
2012001001
2013002013
2014000000
20150570012
2016001001
2017001001
Total142346128112