Frequencies for first 10,000 rows of vtcont_f variable in vehicle dataset :

    traffic |
    control |
     device |
functioning |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,701       77.01       77.01
          1 |          4        0.04       77.05
          2 |          6        0.06       77.11
          3 |      2,169       21.69       98.80
          8 |         42        0.42       99.22
          9 |         78        0.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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