*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000202
1978000303
1979000000
1980000101
1981000202
1982000202
1983000101
1984000000
1985000000
1986002316
19870015410
1988001247
1989000459
19900044816
19910016613
199200311115
1993002122337
1994004172041
19950048719
1996003131935
199700373141
199800354149
199900063036
2000005154767
200100173745
2002000153247
2003002236085
2004002103850
2005003187495
2006002201840
2007000233053
2008000371855
20090004259101
20100079585187
2011000811697
20120025754113
2013001541166
201400013821
2015000606
2016000101
2017000000
2018000000
Total00566317871474