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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         53        0.53        0.53
          0 |         17        0.17        0.70
          1 |        701        7.01        7.71
          2 |        650        6.50       14.21
          3 |        697        6.97       21.18
          4 |        684        6.84       28.02
          5 |        726        7.26       35.28
          6 |         69        0.69       35.97
          7 |         21        0.21       36.18
          8 |         19        0.19       36.37
          9 |        474        4.74       41.11
          A |          1        0.01       41.12
          B |         25        0.25       41.37
          C |         36        0.36       41.73
          D |         34        0.34       42.07
          E |         72        0.72       42.79
          F |         85        0.85       43.64
          G |        112        1.12       44.76
          H |        137        1.37       46.13
          J |        168        1.68       47.81
          K |        251        2.51       50.32
          L |        256        2.56       52.88
          M |        299        2.99       55.87
          N |        325        3.25       59.12
          P |        412        4.12       63.24
          R |        406        4.06       67.30
          S |        503        5.03       72.33
          T |        486        4.86       77.19
          V |        519        5.19       82.38
          W |        517        5.17       87.55
          X |        568        5.68       93.23
          Y |        677        6.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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