Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        184        1.84        1.84
          0 |        250        2.50        4.34
          1 |        214        2.14        6.48
          2 |        197        1.97        8.45
          3 |        179        1.79       10.24
          4 |        195        1.95       12.19
          5 |        154        1.54       13.73
          6 |        179        1.79       15.52
          7 |        180        1.80       17.32
          8 |        180        1.80       19.12
          9 |        565        5.65       24.77
          A |          5        0.05       24.82
          B |        298        2.98       27.80
          C |        337        3.37       31.17
          D |        358        3.58       34.75
          E |        512        5.12       39.87
          F |        556        5.56       45.43
          G |        597        5.97       51.40
          H |        578        5.78       57.18
          J |        633        6.33       63.51
          K |        683        6.83       70.34
          L |        552        5.52       75.86
          M |        598        5.98       81.84
          N |        537        5.37       87.21
          P |        711        7.11       94.32
          R |        538        5.38       99.70
          S |         29        0.29       99.99
          T |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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