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

    Traffic |
   Controls |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,172       71.72       71.72
          1 |         38        0.38       72.10
          2 |        670        6.70       78.80
          3 |        839        8.39       87.19
          4 |         22        0.22       87.41
          5 |         22        0.22       87.63
          6 |         23        0.23       87.86
          7 |         80        0.80       88.66
          8 |          4        0.04       88.70
          9 |          5        0.05       88.75
         98 |      1,051       10.51       99.26
         99 |         74        0.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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