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

    Vehicle |
 Model Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        167        1.67        1.67
          1 |        843        8.43       10.10
          2 |      1,124       11.24       21.34
          3 |        656        6.56       27.90
          4 |        186        1.86       29.76
          5 |        148        1.48       31.24
          6 |        407        4.07       35.31
          7 |        122        1.22       36.53
          8 |        286        2.86       39.39
          9 |        344        3.44       42.83
         10 |        305        3.05       45.88
         11 |        127        1.27       47.15
         12 |         23        0.23       47.38
         13 |         12        0.12       47.50
         14 |          1        0.01       47.51
         15 |         12        0.12       47.63
         31 |         52        0.52       48.15
         32 |          9        0.09       48.24
         33 |          3        0.03       48.27
         34 |         19        0.19       48.46
         62 |         34        0.34       48.80
         63 |        148        1.48       50.28
         64 |         96        0.96       51.24
         65 |        191        1.91       53.15
         66 |        116        1.16       54.31
         69 |        291        2.91       57.22
         71 |         33        0.33       57.55
         72 |        157        1.57       59.12
         73 |        889        8.89       68.01
         74 |        253        2.53       70.54
         75 |          8        0.08       70.62
         76 |          6        0.06       70.68
         78 |         48        0.48       71.16
         79 |        560        5.60       76.76
         81 |        107        1.07       77.83
         82 |         23        0.23       78.06
         83 |         78        0.78       78.84
         85 |         31        0.31       79.15
         88 |         22        0.22       79.37
         89 |        457        4.57       83.94
         98 |         15        0.15       84.09
         99 |      1,591       15.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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