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

    Vehicle |
 Model Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        190        1.90        1.90
          1 |        902        9.02       10.92
          2 |      1,426       14.26       25.18
          3 |        628        6.28       31.46
          4 |        174        1.74       33.20
          5 |        186        1.86       35.06
          6 |        474        4.74       39.80
          7 |        120        1.20       41.00
          8 |        281        2.81       43.81
          9 |        312        3.12       46.93
         10 |        328        3.28       50.21
         11 |        106        1.06       51.27
         12 |         19        0.19       51.46
         13 |          1        0.01       51.47
         15 |          2        0.02       51.49
         31 |         51        0.51       52.00
         32 |          5        0.05       52.05
         33 |          3        0.03       52.08
         34 |         16        0.16       52.24
         62 |         12        0.12       52.36
         63 |         55        0.55       52.91
         64 |         25        0.25       53.16
         65 |         76        0.76       53.92
         66 |          3        0.03       53.95
         69 |        609        6.09       60.04
         71 |         31        0.31       60.35
         72 |         96        0.96       61.31
         73 |        616        6.16       67.47
         74 |        152        1.52       68.99
         75 |          6        0.06       69.05
         76 |          1        0.01       69.06
         78 |        296        2.96       72.02
         79 |        576        5.76       77.78
         81 |         83        0.83       78.61
         82 |         20        0.20       78.81
         83 |          7        0.07       78.88
         88 |        617        6.17       85.05
         89 |         70        0.70       85.75
         98 |        150        1.50       87.25
         99 |      1,275       12.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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