*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970103004
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977002002
1978000000
1979106007
1980003003
1981006006
1982002002
1983011002
1984002002
1985102003
1986024006
19873190013
198820100012
198902110013
199035140022
199194280041
199252260033
199346240034
1994612310049
199547390050
1996616310053
1997317510071
199837240034
199917280036
2000449700105
20014110900114
20020010500105
20035110700113
200415390045
200536580067
200654540063
200710620063
200811620064
2009319800102
20103012300126
20111113200134
201252820089
201300650065
201418160025
201510270019
2016002002
2017022004
Total1161201567001803