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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          7        0.07        0.07
          0 |        118        1.18        1.25
          1 |        415        4.15        5.40
          2 |        346        3.46        8.86
          3 |        221        2.21       11.07
          4 |        181        1.81       12.88
          5 |        146        1.46       14.34
          6 |         75        0.75       15.09
          7 |        375        3.75       18.84
          8 |         93        0.93       19.77
          9 |        539        5.39       25.16
          A |        948        9.48       34.64
          B |      1,024       10.24       44.88
          C |        863        8.63       53.51
          D |        438        4.38       57.89
          E |        504        5.04       62.93
          F |        392        3.92       66.85
          G |        384        3.84       70.69
          H |        396        3.96       74.65
          J |        211        2.11       76.76
          K |        106        1.06       77.82
          L |        207        2.07       79.89
          M |        134        1.34       81.23
          N |        223        2.23       83.46
          O |          1        0.01       83.47
          P |        381        3.81       87.28
          R |        365        3.65       90.93
          S |        267        2.67       93.60
          T |         46        0.46       94.06
          U |         61        0.61       94.67
          V |        114        1.14       95.81
          W |        129        1.29       97.10
          X |         89        0.89       97.99
          Y |        150        1.50       99.49
          Z |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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