Frequencies for first 10,000 rows of vin_11 variable in vehicle dataset :

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        166        1.66        1.66
          0 |        606        6.06        7.72
          1 |        323        3.23       10.95
          2 |        301        3.01       13.96
          3 |        126        1.26       15.22
          4 |        182        1.82       17.04
          5 |        225        2.25       19.29
          6 |        230        2.30       21.59
          7 |        288        2.88       24.47
          8 |        259        2.59       27.06
          9 |        492        4.92       31.98
          A |        425        4.25       36.23
          B |        251        2.51       38.74
          C |        611        6.11       44.85
          D |        185        1.85       46.70
          E |        252        2.52       49.22
          F |        296        2.96       52.18
          G |        191        1.91       54.09
          H |        477        4.77       58.86
          J |        213        2.13       60.99
          K |        347        3.47       64.46
          L |        309        3.09       67.55
          M |        266        2.66       70.21
          N |        194        1.94       72.15
          P |        299        2.99       75.14
          R |        243        2.43       77.57
          S |        299        2.99       80.56
          T |        183        1.83       82.39
          U |        500        5.00       87.39
          V |         60        0.60       87.99
          W |        286        2.86       90.85
          X |        189        1.89       92.74
          Y |        238        2.38       95.12
          Z |        488        4.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016