*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970001001
1971000000
1972000000
1973000000
1974000000
1975000000
1976001001
1977000000
1978000000
1979001001
1980002002
1981011002
1982000000
1983000000
1984000000
1985001001
1986011002
1987020002
1988011002
1989042006
1990081009
1991140005
1992060006
1993032005
199411930023
199502370030
199624230047
199709080098
199802030023
199902250027
200003290041
200102460030
2002046110057
20030129500134
20040991500114
20050129600135
200607980087
20070921400106
20080862400110
2009040140054
2010018220040
2011225170044
2012050310081
20130951600111
201407790086
20151780016
20160380011
2017000000
Total71277267001551