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

    Air Bag |
   Deployed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,204       32.04       32.04
          1 |      1,590       15.90       47.94
          2 |         37        0.37       48.31
          3 |         15        0.15       48.46
          7 |          3        0.03       48.49
          8 |         82        0.82       49.31
          9 |        634        6.34       55.65
         20 |      2,885       28.85       84.50
         28 |          2        0.02       84.52
         97 |        897        8.97       93.49
         98 |        108        1.08       94.57
         99 |        543        5.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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