Frequencies for first 10,000 rows of vin_12 variable in vehicle dataset :

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        358        3.58        3.58
          0 |      1,538       15.38       18.96
          1 |      2,096       20.96       39.92
          2 |      1,217       12.17       52.09
          3 |        704        7.04       59.13
          4 |        445        4.45       63.58
          5 |        804        8.04       71.62
          6 |        617        6.17       77.79
          7 |        409        4.09       81.88
          8 |        219        2.19       84.07
          9 |        485        4.85       88.92
          A |        526        5.26       94.18
          B |        343        3.43       97.61
          C |        124        1.24       98.85
          D |         43        0.43       99.28
          E |         17        0.17       99.45
          F |          9        0.09       99.54
          G |          2        0.02       99.56
          H |          3        0.03       99.59
          J |         14        0.14       99.73
          K |          2        0.02       99.75
          L |          4        0.04       99.79
          M |          6        0.06       99.85
          P |          1        0.01       99.86
          R |          1        0.01       99.87
          S |          2        0.02       99.89
          T |          1        0.01       99.90
          V |          2        0.02       99.92
          W |          3        0.03       99.95
          Y |          3        0.03       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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