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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         42        0.42        0.42
          0 |         29        0.29        0.71
          1 |        668        6.68        7.39
          2 |        620        6.20       13.59
          3 |        643        6.43       20.02
          4 |        647        6.47       26.49
          5 |        674        6.74       33.23
          6 |        691        6.91       40.14
          7 |        693        6.93       47.07
          8 |        539        5.39       52.46
          9 |        565        5.65       58.11
          A |         37        0.37       58.48
          B |         13        0.13       58.61
          C |         13        0.13       58.74
          D |         21        0.21       58.95
          E |         32        0.32       59.27
          F |         36        0.36       59.63
          G |         57        0.57       60.20
          H |         62        0.62       60.82
          J |         81        0.81       61.63
          K |        103        1.03       62.66
          L |        154        1.54       64.20
          M |        161        1.61       65.81
          N |        165        1.65       67.46
          P |        246        2.46       69.92
          R |        267        2.67       72.59
          S |        372        3.72       76.31
          T |        304        3.04       79.35
          U |          1        0.01       79.36
          V |        424        4.24       83.60
          W |        446        4.46       88.06
          X |        542        5.42       93.48
          Y |        652        6.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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