Frequencies for first 10,000 rows of vsurcond variable in vehicle dataset :

    roadway |
    surface |
  condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         52        0.52        0.52
          1 |      8,936       89.36       89.88
          2 |        802        8.02       97.90
          3 |         33        0.33       98.23
          4 |         51        0.51       98.74
          5 |          2        0.02       98.76
          6 |          5        0.05       98.81
          7 |          2        0.02       98.83
          8 |          6        0.06       98.89
         10 |          6        0.06       98.95
         11 |         16        0.16       99.11
         98 |         19        0.19       99.30
         99 |         70        0.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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