*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000112
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000101
1977000000
1978000000
1979000000
1980000101
1981000000
1982000000
1983001001
1984000000
1985000101
1986000000
1987000000
1988000000
1989000000
1990000101
1991001001
1992000101
1993000000
1994003003
1995001001
1996000000
1997001001
1998001001
1999000000
2000001203
2001000000
2002000134
200300011415
200400031013
2005001203
2006001113
2007012339
2008001416
2009002114
2010000112
2011000336
20120005611
2013000404
2014000112
2015000314
2016000000
2017000000
2018000000
Total01164146104