*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970006006
1970000000
1971001001
1972000000
1973001001
1974002002
1975001001
1976000000
1977003003
1978000000
1979000000
1980001001
1981002002
1982000000
1983000000
1984000000
1985001001
1986003003
198700100010
1988005005
1989003003
1990005005
1991008008
1992008008
1993004004
199400120012
199500220022
199600160016
199700140014
199800100010
199900110011
200000210021
200100230023
200200260026
200300320032
200400150015
200500560056
200600110011
200700280028
200800240024
200900730073
201000400040
201100280028
201200720072
201300480048
201400490049
201500690069
201600810081
201700830083
201800960096
20190010400104
20200012200122
20210013400134
20220010200102
2023005005
2024000000
Total001491001491