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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         58        0.58        0.58
          1 |        234        2.34        2.92
          2 |        144        1.44        4.36
          3 |         80        0.80        5.16
          4 |         33        0.33        5.49
          5 |         29        0.29        5.78
          6 |         32        0.32        6.10
          7 |         30        0.30        6.40
          8 |         46        0.46        6.86
          9 |        411        4.11       10.97
          A |        221        2.21       13.18
          B |        455        4.55       17.73
          C |        272        2.72       20.45
          D |         89        0.89       21.34
          E |        104        1.04       22.38
          F |      1,451       14.51       36.89
          G |      2,175       21.75       58.64
          H |        757        7.57       66.21
          J |        214        2.14       68.35
          K |        156        1.56       69.91
          L |        162        1.62       71.53
          M |        531        5.31       76.84
          N |        629        6.29       83.13
          P |        153        1.53       84.66
          Q |         15        0.15       84.81
          R |         71        0.71       85.52
          S |        158        1.58       87.10
          T |        712        7.12       94.22
          U |          5        0.05       94.27
          V |        106        1.06       95.33
          W |         51        0.51       95.84
          X |        204        2.04       97.88
          Y |        138        1.38       99.26
          Z |         74        0.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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