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

    Traffic |
    Control |
Device-Func |
    tioning |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,456       74.56       74.56
          1 |          6        0.06       74.62
          2 |         37        0.37       74.99
          3 |      2,474       24.74       99.73
          9 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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