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

 CARGO BODY |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,084       90.84       90.84
          1 |        283        2.83       93.67
          2 |         54        0.54       94.21
          3 |        133        1.33       95.54
          4 |         79        0.79       96.33
          5 |         13        0.13       96.46
          6 |          6        0.06       96.52
          7 |         20        0.20       96.72
          8 |         25        0.25       96.97
          9 |         13        0.13       97.10
         20 |          5        0.05       97.15
         21 |         38        0.38       97.53
         96 |         19        0.19       97.72
         97 |         43        0.43       98.15
         98 |         58        0.58       98.73
         99 |        127        1.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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