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

    Traffic |
   Controls |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,083       70.83       70.83
          1 |         39        0.39       71.22
          2 |        735        7.35       78.57
          3 |        896        8.96       87.53
          4 |         21        0.21       87.74
          5 |         30        0.30       88.04
          6 |         20        0.20       88.24
          7 |         65        0.65       88.89
          8 |          1        0.01       88.90
          9 |          8        0.08       88.98
         10 |         27        0.27       89.25
         98 |      1,023       10.23       99.48
         99 |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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