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

    Traffic |
   Controls |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,730       67.30       67.30
          1 |         38        0.38       67.68
          2 |        702        7.02       74.70
          3 |        900        9.00       83.70
          4 |         25        0.25       83.95
          5 |         35        0.35       84.30
          6 |          9        0.09       84.39
          7 |         44        0.44       84.83
          8 |          4        0.04       84.87
          9 |          8        0.08       84.95
         10 |         26        0.26       85.21
         98 |      1,219       12.19       97.40
         99 |        260        2.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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