*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970007007
1970000000
1971000000
1972000000
1973000000
1974003003
1975001001
1976002002
1977003003
1978002002
1979001001
1980001001
1981004004
1982000000
1983001001
1984002002
1985004004
1986008008
1987005005
1988006006
1989001001
1990007007
1991008008
1992005005
199300100010
199400120012
199500310031
1996008008
199700120012
199800160016
1999005005
200000200020
200100140014
200200180018
200300210021
200400200020
200500300030
200600290029
200701310032
200800230023
200900360036
201000310031
201101330034
201200490049
201302550057
201400690069
201500920092
20160112600127
20170015000150
20181216000163
20191218300186
20200118000181
20210022600226
202201790080
202300160016
202400240024
Total2111880001893