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

    Traffic |
    Control |
Device-Func |
    tioning |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,790       77.90       77.90
          1 |         17        0.17       78.07
          2 |          5        0.05       78.12
          3 |      2,157       21.57       99.69
          9 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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