*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001045
1970001001
1971000011
1972000000
1973000000
1974001012
1975003003
1976001034
1977004015
1978001023
1979002013
1980004015
1981013026
1982012036
1983002024
1984001034
1985004015
1986012036
19870260715
1988013037
19890690419
199011860429
19913660217
199213110217
199309140629
1994035230159
199511690228
1996218260248
19972863702127
19981782101101
1999162210589
20003791701100
2001754130579
20021783002111
20032832803116
200421556703227
20051833404122
20067778002166
20072547903138
200806811733191
200904711400161
2010213015101284
201112620101229
2012134640099
20130617300134
20141119400106
2015013450058
201600130013
2017003003
2018000000
Total42139614473972985