*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701290012
1970000000
1971003003
1972000000
1973002002
1974003003
1975003003
1976001001
197700110011
1978100001
1979106007
1980005005
1981008008
1982103004
1983016007
1984007007
1985105006
1986027009
198731150019
198820330035
198902210023
199035230031
199194390052
199252430050
199346370047
1994612560074
199547530064
1996616500072
1997317640084
199837490059
199917400048
20005412100130
20014113800143
20020015300153
20035113200138
200414640069
2005369300102
200654770086
20071011700118
20081110300105
20093113700141
20103014700150
20112116000163
201210327000283
20139146900479
201427251400543
201525367500703
201612171800731
201717669400717
201814666800688
201911485500870
2020003003
2021033006
2022000000
Total2121436913007268