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

    VEHICLE |
CONFIGURATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,124       91.24       91.24
          1 |        136        1.36       92.60
          2 |         62        0.62       93.22
          3 |         33        0.33       93.55
          4 |         22        0.22       93.77
          5 |         14        0.14       93.91
          6 |        447        4.47       98.38
          7 |         43        0.43       98.81
         19 |          8        0.08       98.89
         20 |          6        0.06       98.95
         21 |         56        0.56       99.51
         99 |         49        0.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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