Frequencies for first 10,000 rows of veh_cf1 variable in vehicle dataset :

    RELATED |
   FACTOR 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,664       96.64       96.64
          1 |        135        1.35       97.99
          2 |         19        0.19       98.18
          4 |          6        0.06       98.24
          5 |          5        0.05       98.29
          6 |          1        0.01       98.30
          7 |          6        0.06       98.36
          9 |          3        0.03       98.39
         11 |          1        0.01       98.40
         16 |          4        0.04       98.44
         18 |         12        0.12       98.56
         19 |          3        0.03       98.59
         32 |         72        0.72       99.31
         33 |          1        0.01       99.32
         35 |          9        0.09       99.41
         36 |         37        0.37       99.78
         37 |          1        0.01       99.79
         39 |          2        0.02       99.81
         41 |          1        0.01       99.82
         44 |          2        0.02       99.84
         99 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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