Frequencies for first 10,000 rows of veh_cf2 variable in vehicle dataset :

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,700       97.00       97.00
          1 |          7        0.07       97.07
          2 |         26        0.26       97.33
          3 |          9        0.09       97.42
          4 |          6        0.06       97.48
          5 |          3        0.03       97.51
          6 |          1        0.01       97.52
          7 |          2        0.02       97.54
          9 |          2        0.02       97.56
         10 |          2        0.02       97.58
         13 |          4        0.04       97.62
         14 |          1        0.01       97.63
         16 |          3        0.03       97.66
         18 |         12        0.12       97.78
         32 |          3        0.03       97.81
         33 |          1        0.01       97.82
         34 |          2        0.02       97.84
         35 |          3        0.03       97.87
         99 |        213        2.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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