Frequencies for first 10,000 rows of air_bag variable in person dataset :

    air bag |
   deployed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,087       30.87       30.87
          1 |      1,763       17.63       48.50
          2 |         38        0.38       48.88
          3 |         40        0.40       49.28
          7 |          7        0.07       49.35
          8 |        130        1.30       50.65
          9 |        651        6.51       57.16
         20 |      2,964       29.64       86.80
         97 |        875        8.75       95.55
         98 |        106        1.06       96.61
         99 |        339        3.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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