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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
           |          1        0.01        0.01
          0 |        138        1.38        1.39
          1 |        852        8.52        9.91
          2 |        422        4.22       14.13
          3 |        349        3.49       17.62
          4 |        181        1.81       19.43
          5 |        165        1.65       21.08
          6 |        235        2.35       23.43
          7 |        142        1.42       24.85
          8 |        111        1.11       25.96
          9 |        828        8.28       34.24
          A |        402        4.02       38.26
          B |        351        3.51       41.77
          C |        458        4.58       46.35
          D |        182        1.82       48.17
          E |        253        2.53       50.70
          F |        331        3.31       54.01
          G |        554        5.54       59.55
          H |        574        5.74       65.29
          I |          1        0.01       65.30
          J |        301        3.01       68.31
          K |        346        3.46       71.77
          L |        583        5.83       77.60
          M |        234        2.34       79.94
          N |        289        2.89       82.83
          O |          3        0.03       82.86
          P |        166        1.66       84.52
          Q |         59        0.59       85.11
          R |        285        2.85       87.96
          S |        242        2.42       90.38
          T |        242        2.42       92.80
          U |         44        0.44       93.24
          V |         86        0.86       94.10
          W |        134        1.34       95.44
          X |        169        1.69       97.13
          Y |        117        1.17       98.30
          Z |        170        1.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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