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

 Cargo Body |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,203       92.03       92.03
          1 |        316        3.16       95.19
          2 |         46        0.46       95.65
          3 |         84        0.84       96.49
          4 |         45        0.45       96.94
          5 |          4        0.04       96.98
          6 |          4        0.04       97.02
          7 |         16        0.16       97.18
          8 |         14        0.14       97.32
          9 |          3        0.03       97.35
         10 |         20        0.20       97.55
         11 |          6        0.06       97.61
         22 |         74        0.74       98.35
         28 |          4        0.04       98.39
         96 |         44        0.44       98.83
         97 |         46        0.46       99.29
         98 |         31        0.31       99.60
         99 |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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