*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979000000
1980000000
1981000000
1982000000
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991000000
1992000000
1993000000
1994000000
1995000000
1996000000
1997002002
1998001001
1999001001
2000002013
2001010001
2002002002
2003003014
2004034029
20050780722
200603160827
2007103112356
2008024322067
2009037101589
20101476024105
201110160021182
20120764038109
2013138917101
201404270132
201501300233
201600320537
2017001001
Total4386634175884