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

    NON-CDL |
    LICENCE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        744        7.44        7.44
          1 |      8,567       85.67       93.11
          2 |        188        1.88       94.99
          7 |         16        0.16       95.15
          8 |          6        0.06       95.21
          9 |        432        4.32       99.53
          . |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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