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

    Vehicle |
 Model Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        119        1.19        1.19
          1 |        946        9.46       10.65
          2 |      1,103       11.03       21.68
          3 |        746        7.46       29.14
          4 |        283        2.83       31.97
          5 |        213        2.13       34.10
          6 |        435        4.35       38.45
          7 |        175        1.75       40.20
          8 |        321        3.21       43.41
          9 |        442        4.42       47.83
         10 |        358        3.58       51.41
         11 |        134        1.34       52.75
         12 |        115        1.15       53.90
         13 |         82        0.82       54.72
         14 |         18        0.18       54.90
         15 |         80        0.80       55.70
         16 |          1        0.01       55.71
         31 |         45        0.45       56.16
         32 |         38        0.38       56.54
         33 |         10        0.10       56.64
         34 |         54        0.54       57.18
         41 |          1        0.01       57.19
         42 |          1        0.01       57.20
         45 |          1        0.01       57.21
         61 |         10        0.10       57.31
         62 |         36        0.36       57.67
         63 |        102        1.02       58.69
         64 |        133        1.33       60.02
         65 |        315        3.15       63.17
         66 |        243        2.43       65.60
         69 |        181        1.81       67.41
         71 |        151        1.51       68.92
         72 |        340        3.40       72.32
         73 |      1,076       10.76       83.08
         74 |        344        3.44       86.52
         75 |         11        0.11       86.63
         76 |         41        0.41       87.04
         78 |         12        0.12       87.16
         79 |        108        1.08       88.24
         81 |        135        1.35       89.59
         82 |         28        0.28       89.87
         83 |         40        0.40       90.27
         84 |        145        1.45       91.72
         85 |         11        0.11       91.83
         86 |          1        0.01       91.84
         87 |          3        0.03       91.87
         88 |        109        1.09       92.96
         89 |        262        2.62       95.58
         98 |          8        0.08       95.66
         99 |        434        4.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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