Frequencies for pmake variable in parkwork dataset :

    vehicle |
       make |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         21        1.93        1.93
          6 |         17        1.56        3.49
          7 |         59        5.42        8.91
          9 |          3        0.28        9.18
         12 |        194       17.81       27.00
         13 |          5        0.46       27.46
         14 |          8        0.73       28.19
         18 |         18        1.65       29.84
         19 |         11        1.01       30.85
         20 |        158       14.51       45.36
         21 |          9        0.83       46.19
         22 |         15        1.38       47.57
         23 |         44        4.04       51.61
         24 |          8        0.73       52.34
         30 |         10        0.92       53.26
         32 |          7        0.64       53.90
         34 |         10        0.92       54.82
         35 |         60        5.51       60.33
         36 |          1        0.09       60.42
         37 |         52        4.78       65.20
         38 |          5        0.46       65.66
         39 |          1        0.09       65.75
         41 |         24        2.20       67.95
         42 |          9        0.83       68.78
         47 |          1        0.09       68.87
         48 |          6        0.55       69.42
         49 |         86        7.90       77.32
         51 |         15        1.38       78.70
         52 |          9        0.83       79.52
         53 |          2        0.18       79.71
         54 |         14        1.29       80.99
         55 |         14        1.29       82.28
         58 |          5        0.46       82.74
         59 |         16        1.47       84.21
         62 |          3        0.28       84.48
         63 |         14        1.29       85.77
         64 |          1        0.09       85.86
         67 |          1        0.09       85.95
         69 |          1        0.09       86.04
         72 |          3        0.28       86.32
         76 |          1        0.09       86.41
         82 |         44        4.04       90.45
         84 |         39        3.58       94.03
         85 |          5        0.46       94.49
         86 |         17        1.56       96.05
         87 |         12        1.10       97.15
         92 |          1        0.09       97.25
         98 |         20        1.84       99.08
         99 |         10        0.92      100.00
------------+-----------------------------------
      Total |      1,089      100.00

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