Frequencies for dr_cf3 variable in vehicle dataset :

    RELATED |
   FACTOR 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        288       52.94       52.94
          5 |          1        0.18       53.12
         26 |          3        0.55       53.68
         27 |          1        0.18       53.86
         28 |         13        2.39       56.25
         29 |          4        0.74       56.99
         35 |          2        0.37       57.35
         36 |        143       26.29       83.64
         38 |         17        3.12       86.76
         39 |          7        1.29       88.05
         44 |          5        0.92       88.97
         48 |          2        0.37       89.34
         51 |         29        5.33       94.67
         53 |          2        0.37       95.04
         70 |          2        0.37       95.40
         84 |          1        0.18       95.59
         90 |         24        4.41      100.00
------------+-----------------------------------
      Total |        544      100.00

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