Frequencies for first 10,000 rows of persons variable in accident dataset :

  number of |
mv occupant |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         21        0.21        0.21
          1 |      4,271       42.71       42.92
          2 |      2,588       25.88       68.80
          3 |      1,383       13.83       82.63
          4 |        755        7.55       90.18
          5 |        416        4.16       94.34
          6 |        252        2.52       96.86
          7 |        132        1.32       98.18
          8 |         77        0.77       98.95
          9 |         44        0.44       99.39
         10 |         21        0.21       99.60
         11 |         14        0.14       99.74
         12 |          8        0.08       99.82
         13 |          4        0.04       99.86
         14 |          2        0.02       99.88
         15 |          3        0.03       99.91
         16 |          1        0.01       99.92
         19 |          4        0.04       99.96
         21 |          1        0.01       99.97
         22 |          1        0.01       99.98
         33 |          1        0.01       99.99
         52 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016