Frequencies for pcargtyp variable in parkwork dataset :

 cargo body |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        904       83.01       83.01
          1 |         57        5.23       88.25
          2 |          5        0.46       88.71
          3 |         30        2.75       91.46
          4 |         14        1.29       92.75
          5 |          2        0.18       92.93
          6 |          1        0.09       93.02
         12 |          4        0.37       93.39
         22 |          4        0.37       93.76
         96 |         12        1.10       94.86
         97 |         35        3.21       98.07
         98 |         21        1.93      100.00
------------+-----------------------------------
      Total |      1,089      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016