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

    Vehicle |
 Model Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         73        0.73        0.73
          1 |        999        9.99       10.72
          2 |      1,088       10.88       21.60
          3 |        765        7.65       29.25
          4 |        269        2.69       31.94
          5 |        225        2.25       34.19
          6 |        445        4.45       38.64
          7 |        153        1.53       40.17
          8 |        269        2.69       42.86
          9 |        436        4.36       47.22
         10 |        386        3.86       51.08
         11 |        113        1.13       52.21
         12 |         89        0.89       53.10
         13 |         48        0.48       53.58
         14 |         21        0.21       53.79
         15 |         51        0.51       54.30
         31 |         28        0.28       54.58
         32 |         30        0.30       54.88
         33 |          8        0.08       54.96
         34 |         43        0.43       55.39
         61 |          6        0.06       55.45
         62 |         27        0.27       55.72
         63 |        111        1.11       56.83
         64 |        119        1.19       58.02
         65 |        278        2.78       60.80
         66 |        219        2.19       62.99
         69 |        282        2.82       65.81
         71 |        115        1.15       66.96
         72 |        311        3.11       70.07
         73 |        936        9.36       79.43
         74 |        278        2.78       82.21
         75 |         14        0.14       82.35
         76 |         30        0.30       82.65
         78 |          7        0.07       82.72
         79 |        454        4.54       87.26
         81 |        114        1.14       88.40
         82 |         28        0.28       88.68
         83 |         31        0.31       88.99
         84 |          1        0.01       89.00
         85 |         28        0.28       89.28
         88 |        104        1.04       90.32
         89 |        457        4.57       94.89
         98 |         20        0.20       95.09
         99 |        491        4.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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