*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970000000
1971002002
1972000000
1973000000
1974002002
1975000000
1976000000
1977007007
1978002002
197900130013
1980001001
1981004004
1982002002
1983003003
1984000000
1985001001
1986007007
1987007007
1988008008
198900110011
199000130013
199100170017
199200150015
199300220022
199400260026
199500430043
199600280028
199700220022
199800190019
199900160016
200000560056
200100500050
200200560056
200300340034
200400310031
200500350035
200600380139
200700430043
200800510051
200900710071
201000510051
201100770077
20120011700117
201300830083
201400980098
20150013500135
20160016800168
20170023100231
20180022500225
20190023200232
20200035700357
20210033100331
20220017600176
2023001001
Total003039013040