Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         48        0.48        0.48
          0 |        243        2.43        2.91
          1 |      1,143       11.43       14.34
          2 |        527        5.27       19.61
          3 |        477        4.77       24.38
          4 |        244        2.44       26.82
          5 |        354        3.54       30.36
          6 |        387        3.87       34.23
          7 |        123        1.23       35.46
          8 |        122        1.22       36.68
          9 |      1,667       16.67       53.35
          A |        315        3.15       56.50
          B |        339        3.39       59.89
          C |        387        3.87       63.76
          D |        167        1.67       65.43
          E |        191        1.91       67.34
          F |        126        1.26       68.60
          G |        201        2.01       70.61
          H |        329        3.29       73.90
          I |          4        0.04       73.94
          J |        279        2.79       76.73
          K |        272        2.72       79.45
          L |        580        5.80       85.25
          M |        151        1.51       86.76
          N |        102        1.02       87.78
          O |          2        0.02       87.80
          P |        129        1.29       89.09
          Q |         19        0.19       89.28
          R |        302        3.02       92.30
          S |        138        1.38       93.68
          T |        139        1.39       95.07
          U |         41        0.41       95.48
          V |         94        0.94       96.42
          W |         64        0.64       97.06
          X |        111        1.11       98.17
          Y |         91        0.91       99.08
          Z |         92        0.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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