Frequencies for whlbs_lg variable in vehicle dataset :

    WHLBASE |
  LONG-AUTO |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        334       70.76       70.76
        923 |          1        0.21       70.97
       1140 |          2        0.42       71.40
       1171 |          1        0.21       71.61
       1175 |          1        0.21       71.82
       1179 |          2        0.42       72.25
       1180 |          1        0.21       72.46
       1196 |          1        0.21       72.67
       1229 |          1        0.21       72.88
       1272 |          1        0.21       73.09
       1330 |          1        0.21       73.31
       1385 |          1        0.21       73.52
       1405 |          1        0.21       73.73
       1570 |          1        0.21       73.94
       1571 |          1        0.21       74.15
       1575 |          1        0.21       74.36
       1650 |          1        0.21       74.58
       1724 |          1        0.21       74.79
       1760 |          2        0.42       75.21
       2390 |          1        0.21       75.42
       2540 |          1        0.21       75.64
       2560 |          1        0.21       75.85
       2580 |          1        0.21       76.06
       2760 |          2        0.42       76.48
       9999 |         82       17.37       93.86
          . |         29        6.14      100.00
------------+-----------------------------------
      Total |        472      100.00

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