*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
1997000202
1998000101
1999000101
2000100203
2001000011
2002000202
2003100304
2004200439
20057008722
200680016327
2007231131056
2008202043267
2009150071389
20102401764105
201121011600182
20123800647109
2013711893101
201410027432
201520030133
201650032037
2017000101
2018000000
Total1754466338884