*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000202
1976000404
1977000303
1978000000
1979000202
1980000101
1981000000
1982000303
1983000000
1984000404
1985000213
1986000819
1987000729
19880008412
198900011920
1990000102434
1991001181837
1992002202042
19930032683112
199400335146184
1995001119109139
199600531122158
199700744151202
199800625185216
199900420110134
2000001033219262
200100928167204
200200435151190
200300845274327
200400385326414
200500566229300
2006004122229355
2007004130185319
2008005167251423
2009005211136352
2010006356165527
201100337744424
201200214694242
201300324571319
201400612230158
2015000521163
2016001151733
2017000000
2018000000
Total00120253835846242