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

    air bag |
   deployed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,746       27.46       27.46
          1 |      1,498       14.98       42.44
          2 |         49        0.49       42.93
          3 |         35        0.35       43.28
          7 |          6        0.06       43.34
          8 |        215        2.15       45.49
          9 |        885        8.85       54.34
         20 |      3,004       30.04       84.38
         28 |          3        0.03       84.41
         97 |      1,014       10.14       94.55
         98 |        131        1.31       95.86
         99 |        414        4.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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