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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
           |          1        0.01        0.01
          0 |        182        1.82        1.83
          1 |        918        9.18       11.01
          2 |        498        4.98       15.99
          3 |        372        3.72       19.71
          4 |        189        1.89       21.60
          5 |        191        1.91       23.51
          6 |        308        3.08       26.59
          7 |        141        1.41       28.00
          8 |        108        1.08       29.08
          9 |        882        8.82       37.90
          A |        435        4.35       42.25
          B |        348        3.48       45.73
          C |        484        4.84       50.57
          D |        197        1.97       52.54
          E |        243        2.43       54.97
          F |        202        2.02       56.99
          G |        374        3.74       60.73
          H |        480        4.80       65.53
          I |          2        0.02       65.55
          J |        318        3.18       68.73
          K |        337        3.37       72.10
          L |        630        6.30       78.40
          M |        252        2.52       80.92
          N |        251        2.51       83.43
          O |          3        0.03       83.46
          P |        141        1.41       84.87
          Q |         68        0.68       85.55
          R |        314        3.14       88.69
          S |        206        2.06       90.75
          T |        232        2.32       93.07
          U |         41        0.41       93.48
          V |         92        0.92       94.40
          W |        123        1.23       95.63
          X |        144        1.44       97.07
          Y |         98        0.98       98.05
          Z |        195        1.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016