*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970000000
1971000000
1972000000
1973000000
1974001001
1975000000
1976001001
1977002002
1978000000
1979002002
1980000000
1981002002
1982001001
1983002002
1984000000
1985002002
1986005005
1987005005
198800190019
198900120012
199000100010
199100220022
199200210021
1993007007
199400210021
199500240024
199600220022
199700120012
199800240024
199900120012
200000520052
200100360036
200200480048
200300240024
200401170018
200500170017
200600280028
200700530053
200800190019
200900460046
201000260026
201100570057
201200750075
201300900090
201400750075
20150017500175
20160025300253
20172025600258
20180024800248
20190021500215
2020000000
2021000000
Total212041002044