*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970005005
1970001001
1971002002
1972001001
1973002002
1974004004
1975002002
1976003003
1977002002
1978000000
1979004004
1980011002
1981003003
1982003003
1983002002
1984003003
1985003003
1986007007
1987004004
1988027009
198900100010
19900280010
19911280011
199203100013
199306260032
199401350036
199532270032
199603220025
199702190021
199801240025
1999017008
200014280033
200101200021
200200260026
200300230023
200413320036
200501300031
200600160016
200700320032
200801370038
200900210021
201001370038
201105480053
201201920093
20131010400105
20140214100143
20151114700149
20160020700207
20170119800199
20180126300264
20190028000280
20200037100371
20210130500306
20220127800279
2023002002
Total8502993003051