*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970003003
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977001001
1978001001
1979003003
1980000000
1981001001
1982001001
1983001001
1984000000
1985001001
1986003003
1987006006
1988004004
1989004004
1990003003
199100200020
199200110011
1993008008
1994008008
199500120012
199600130013
199700110011
199800140014
199900100010
200000160016
200100180018
200200230023
200300120012
2004008008
200500310031
200600220022
200700190019
200800100010
200900220022
201000130013
201100160016
201200120012
201300160016
201400190019
201500320032
201600470047
201700350035
201800410041
201900470047
202000370037
202100710071
202200290029
2023000000
2024000000
Total0073500735