Frequencies for first 10,000 rows of t_cont_f variable in accident dataset :

    Traffic |
    Control |
Device-Func |
    tioning |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,704       77.04       77.04
          1 |          7        0.07       77.11
          2 |          8        0.08       77.19
          3 |      2,228       22.28       99.47
          9 |         53        0.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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