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

    Air Bag |
   Deployed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,151       31.51       31.51
          1 |      1,937       19.37       50.88
          2 |         88        0.88       51.76
          3 |         29        0.29       52.05
          7 |          8        0.08       52.13
          8 |        106        1.06       53.19
          9 |        505        5.05       58.24
         20 |      2,604       26.04       84.28
         28 |          3        0.03       84.31
         97 |        870        8.70       93.01
         98 |        118        1.18       94.19
         99 |        581        5.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016