*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970001001
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978001001
1979001001
1980002002
1981002002
1982004004
1983000000
1984000000
1985100001
1986010001
1987012003
1988011002
1989061007
1990061007
199111160018
1992153009
199301800018
199444670057
1995127110039
199624520049
19972105900116
199807740081
199904660052
2000155160072
2001059100069
2002065220087
200311812000202
200403451600361
200501881400202
20060943400128
20070895000139
200803113900350
2009152330086
201001196700186
2011010710081
2012068290097
2013043180061
2014036230059
201505120017
2016011002
2017010001
Total152117540002672