Frequencies for pcargtyp variable in parkwork dataset :

 Cargo Body |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        828       82.63       82.63
          1 |         63        6.29       88.92
          2 |          7        0.70       89.62
          3 |         27        2.69       92.32
          4 |         14        1.40       93.71
          5 |          1        0.10       93.81
          6 |          2        0.20       94.01
          7 |          2        0.20       94.21
         10 |          2        0.20       94.41
         12 |          3        0.30       94.71
         22 |          8        0.80       95.51
         28 |          7        0.70       96.21
         96 |         16        1.60       97.80
         97 |         15        1.50       99.30
         98 |          6        0.60       99.90
         99 |          1        0.10      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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