*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001012
1970000000
1971001001
1972000000
1973000000
1974000000
1975001001
1976000000
1977000000
1978000000
1979001001
1980001001
1981001012
1982100001
1983000000
1984000000
1985001001
1986100001
1987001001
1988101002
1989000000
1990000000
1991131005
199203980047
19932850116
199446230069
199514430048
199601420016
1997020110031
1998007007
199901200012
200001120013
200111210014
200201840022
20030770014
200401320015
20051223200226
200602630029
200704360049
20080152400156
200904520047
20106860020
20114830015
201211520018
2013102003
2014021003
2015103004
2016010001
2017000000
Total2677610903914