Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        130        1.30        1.30
          1 |        659        6.59        7.89
          2 |        394        3.94       11.83
          3 |        270        2.70       14.53
          4 |        125        1.25       15.78
          5 |        137        1.37       17.15
          6 |        175        1.75       18.90
          7 |        110        1.10       20.00
          8 |         82        0.82       20.82
          9 |        784        7.84       28.66
          A |        379        3.79       32.45
          B |        369        3.69       36.14
          C |        434        4.34       40.48
          D |        189        1.89       42.37
          E |        193        1.93       44.30
          F |        522        5.22       49.52
          G |        876        8.76       58.28
          H |        714        7.14       65.42
          I |          1        0.01       65.43
          J |        259        2.59       68.02
          K |        296        2.96       70.98
          L |        510        5.10       76.08
          M |        246        2.46       78.54
          N |        350        3.50       82.04
          P |        154        1.54       83.58
          Q |         47        0.47       84.05
          R |        234        2.34       86.39
          S |        228        2.28       88.67
          T |        393        3.93       92.60
          U |         29        0.29       92.89
          V |        105        1.05       93.94
          W |        136        1.36       95.30
          X |        187        1.87       97.17
          Y |        143        1.43       98.60
          Z |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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