Frequencies for v_config variable in vehnit dataset :

    VEHICLE |
CONFIGURATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        940       84.23       84.23
          1 |         58        5.20       89.43
          2 |         17        1.52       90.95
          3 |          8        0.72       91.67
          4 |          9        0.81       92.47
          5 |          2        0.18       92.65
          6 |         69        6.18       98.84
          7 |          3        0.27       99.10
         19 |          2        0.18       99.28
         20 |          2        0.18       99.46
         21 |          2        0.18       99.64
         70 |          1        0.09       99.73
         99 |          3        0.27      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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