*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975002002
1976004004
1977003003
1978000000
1979002002
1980001001
1981000000
1982003003
1983000000
1984004004
1985012003
1986018009
1987027009
19880480012
198909110020
1990024100034
1991118180037
1992220200042
19933832600112
199431463500184
1995111091900139
199651223100158
199771514400202
199861852500216
199941102000134
2000102193300262
200191672800204
200241513500190
200382744500327
200433268500414
200552296600300
2006422912200355
2007418513000319
2008525116700423
2009513621100352
2010616535600527
201134437700424
201229414600242
201337124500319
201463012200158
2015011520063
2016117150033
2017000000
Total12035842538006242