Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        340        3.40        3.41
          1 |        818        8.18       11.59
          2 |        690        6.90       18.49
          3 |        452        4.52       23.01
          4 |        309        3.09       26.10
          5 |        284        2.84       28.94
          6 |        208        2.08       31.02
          7 |        744        7.44       38.46
          8 |        217        2.17       40.63
          9 |        890        8.90       49.53
          A |        904        9.04       58.57
          B |        878        8.78       67.35
          C |        436        4.36       71.71
          D |        215        2.15       73.86
          E |        215        2.15       76.01
          F |        204        2.04       78.05
          G |        268        2.68       80.73
          H |        222        2.22       82.95
          J |        134        1.34       84.29
          K |         98        0.98       85.27
          L |         85        0.85       86.12
          M |        123        1.23       87.35
          N |        166        1.66       89.01
          P |        200        2.00       91.01
          Q |          1        0.01       91.02
          R |        358        3.58       94.60
          S |        161        1.61       96.21
          T |         58        0.58       96.79
          U |         65        0.65       97.44
          V |         24        0.24       97.68
          W |         38        0.38       98.06
          X |         15        0.15       98.21
          Y |        111        1.11       99.32
          Z |         68        0.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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