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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        233        2.33        2.33
          1 |      1,040       10.40       12.73
          2 |        512        5.12       17.85
          3 |        432        4.32       22.17
          4 |        195        1.95       24.12
          5 |        210        2.10       26.22
          6 |        333        3.33       29.55
          7 |        152        1.52       31.07
          8 |        110        1.10       32.17
          9 |        696        6.96       39.13
          A |        445        4.45       43.58
          B |        314        3.14       46.72
          C |        533        5.33       52.05
          D |        226        2.26       54.31
          E |        271        2.71       57.02
          F |        178        1.78       58.80
          G |        268        2.68       61.48
          H |        461        4.61       66.09
          I |          3        0.03       66.12
          J |        354        3.54       69.66
          K |        305        3.05       72.71
          L |        674        6.74       79.45
          M |        200        2.00       81.45
          N |        208        2.08       83.53
          O |          5        0.05       83.58
          P |        132        1.32       84.90
          Q |         71        0.71       85.61
          R |        293        2.93       88.54
          S |        228        2.28       90.82
          T |        184        1.84       92.66
          U |         37        0.37       93.03
          V |         75        0.75       93.78
          W |        136        1.36       95.14
          X |        146        1.46       96.60
          Y |        124        1.24       97.84
          Z |        216        2.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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