*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701290012
1970000000
1971002002
1972000000
1973002002
1974003003
1975003003
1976001001
197700100010
1978100001
1979106007
1980005005
1981008008
1982103004
1983014005
1984007007
1985105006
1986027009
198731120016
198820170019
198902170019
199035190027
199194340047
199252310038
199346310041
1994612440062
199547450056
1996616430065
1997317590079
199837330043
199917390047
20005410800117
20014111900124
20020011900119
20035112201129
200414580063
200536860095
200654680077
200710810082
200811860088
20093112000124
20103013800141
20112115200155
20128216400174
20138122300232
201422119800221
201524326200289
201611028700298
201717537600398
2018121242100445
201910344800461
20204048000484
20215546800478
20223246400469
202301100011
2024000000
Total2111495557015918