*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970000000
1971000000
1972000000
1973000000
1974000011
1975000033
1976000055
1977000055
1978100001
1979000022
1980002002
1981001012
1982002046
1983001045
1984000033
1985002046
1986012036
19870130610
1988002057
19890040711
199000201012
199101110315
19920030710
1993001157
1994011401429
199510111720
199601701119
1997001401731
1998201401632
199910621019
200010701321
200130401118
200222140624
20030280515
2004011501430
2005012702048
2006111611534
2007212301036
2008112801242
200900191929
201010210729
201100380442
2012001701128
201300120214
2014004004
2015005005
2016003003
2017001001
Total16143656292693