*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19708340015
1970100001
1971101002
1972100001
1973000000
1974001001
1975000000
1976000000
1977002002
1978000000
1979003003
1980002002
1981122005
1982101002
1983002002
1984000000
1985003003
1986102003
1987206008
1988204006
1989125008
1990003003
199113110015
199200100010
19933190013
199432150020
199574260037
1996106200036
199722130017
199804140018
199920100012
200022140018
200132100015
200250230028
2003211230036
200442360042
200534190026
200601210022
200700210021
200800240024
2009141350050
2010122260040
201130300033
2012004004
20132260010
2014102003
2015204006
201620100012
2017200002
2018000000
2019000000
2020000000
Total1045647700637