Frequencies for dr_cf3 variable in vehicle dataset :

    RELATED |
   FACTOR 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        281       44.89       44.89
          5 |          1        0.16       45.05
         21 |          2        0.32       45.37
         26 |          6        0.96       46.33
         27 |          3        0.48       46.81
         28 |         27        4.31       51.12
         29 |          4        0.64       51.76
         35 |          5        0.80       52.56
         36 |        180       28.75       81.31
         38 |         23        3.67       84.98
         39 |         12        1.92       86.90
         44 |          2        0.32       87.22
         51 |         33        5.27       92.49
         52 |          1        0.16       92.65
         70 |          1        0.16       92.81
         83 |          1        0.16       92.97
         87 |          2        0.32       93.29
         90 |         42        6.71      100.00
------------+-----------------------------------
      Total |        626      100.00

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