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

    VEHICLE |
CONFIGURATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,277       92.77       92.77
          1 |        127        1.27       94.04
          2 |         44        0.44       94.48
          3 |         20        0.20       94.68
          4 |         15        0.15       94.83
          5 |         12        0.12       94.95
          6 |        391        3.91       98.86
          7 |         28        0.28       99.14
          8 |          1        0.01       99.15
         19 |          7        0.07       99.22
         20 |          8        0.08       99.30
         21 |         51        0.51       99.81
         99 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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