Frequencies for pmake variable in parkwork dataset :

    vehicle |
       make |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         21        1.94        1.94
          6 |         17        1.57        3.51
          7 |         60        5.54        9.04
          9 |          3        0.28        9.32
         12 |        193       17.80       27.12
         13 |          5        0.46       27.58
         14 |          8        0.74       28.32
         18 |         18        1.66       29.98
         19 |         11        1.01       31.00
         20 |        157       14.48       45.48
         21 |          9        0.83       46.31
         22 |         15        1.38       47.69
         23 |         44        4.06       51.75
         24 |          8        0.74       52.49
         30 |         10        0.92       53.41
         32 |          7        0.65       54.06
         34 |         10        0.92       54.98
         35 |         60        5.54       60.52
         36 |          1        0.09       60.61
         37 |         52        4.80       65.41
         38 |          5        0.46       65.87
         39 |          1        0.09       65.96
         41 |         24        2.21       68.17
         42 |          9        0.83       69.00
         48 |          6        0.55       69.56
         49 |         85        7.84       77.40
         51 |         15        1.38       78.78
         52 |          9        0.83       79.61
         53 |          2        0.18       79.80
         54 |         14        1.29       81.09
         55 |         14        1.29       82.38
         58 |          5        0.46       82.84
         59 |         16        1.48       84.32
         62 |          3        0.28       84.59
         63 |         13        1.20       85.79
         64 |          1        0.09       85.89
         67 |          1        0.09       85.98
         69 |          1        0.09       86.07
         72 |          3        0.28       86.35
         76 |          1        0.09       86.44
         82 |         44        4.06       90.50
         84 |         39        3.60       94.10
         85 |          5        0.46       94.56
         86 |         17        1.57       96.13
         87 |         11        1.01       97.14
         92 |          1        0.09       97.23
         98 |         20        1.85       99.08
         99 |         10        0.92      100.00
------------+-----------------------------------
      Total |      1,084      100.00

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