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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         42        0.42        0.42
          1 |        147        1.47        1.89
          2 |         92        0.92        2.81
          3 |         42        0.42        3.23
          4 |          8        0.08        3.31
          5 |         22        0.22        3.53
          6 |         16        0.16        3.69
          7 |         29        0.29        3.98
          8 |         45        0.45        4.43
          9 |        393        3.93        8.36
          A |        214        2.14       10.50
          B |        485        4.85       15.35
          C |        252        2.52       17.87
          D |         78        0.78       18.65
          E |         48        0.48       19.13
          F |      1,777       17.77       36.90
          G |      2,304       23.04       59.94
          H |        827        8.27       68.21
          J |        220        2.20       70.41
          K |        109        1.09       71.50
          L |        120        1.20       72.70
          M |        484        4.84       77.54
          N |        653        6.53       84.07
          P |        143        1.43       85.50
          Q |          7        0.07       85.57
          R |         26        0.26       85.83
          S |        131        1.31       87.14
          T |        722        7.22       94.36
          U |          5        0.05       94.41
          V |        146        1.46       95.87
          W |         45        0.45       96.32
          X |        187        1.87       98.19
          Y |        139        1.39       99.58
          Z |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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