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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        114        1.14        1.14
          1 |        608        6.08        7.22
          2 |        325        3.25       10.47
          3 |        232        2.32       12.79
          4 |        100        1.00       13.79
          5 |        119        1.19       14.98
          6 |        151        1.51       16.49
          7 |        106        1.06       17.55
          8 |         77        0.77       18.32
          9 |        777        7.77       26.09
          A |        319        3.19       29.28
          B |        361        3.61       32.89
          C |        380        3.80       36.69
          D |        164        1.64       38.33
          E |        169        1.69       40.02
          F |        640        6.40       46.42
          G |      1,067       10.67       57.09
          H |        743        7.43       64.52
          I |          1        0.01       64.53
          J |        252        2.52       67.05
          K |        335        3.35       70.40
          L |        453        4.53       74.93
          M |        288        2.88       77.81
          N |        433        4.33       82.14
          P |        136        1.36       83.50
          Q |         31        0.31       83.81
          R |        214        2.14       85.95
          S |        214        2.14       88.09
          T |        478        4.78       92.87
          U |         30        0.30       93.17
          V |        108        1.08       94.25
          W |        126        1.26       95.51
          X |        167        1.67       97.18
          Y |        145        1.45       98.63
          Z |        137        1.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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