*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979002002
1980000000
1981000000
1982000000
1983000000
1984000000
1985001001
1986002002
1987003003
1988004004
1989002002
1990002002
1991009009
1992006006
1993002002
1994004004
199500140014
1996009009
1997006006
199800140014
1999008008
200000320032
200100330033
200200290029
200300340034
2004008008
200500170017
200600110011
2007009009
200800130013
200900100010
2010007007
201100150015
201200140014
201300160016
201400170017
201500240024
201600280028
201700390039
201800450045
201900410041
202000340034
202100590059
202200440044
2023003003
2024000000
Total0067000670