Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         20        0.20        0.20
          1 |      5,098       50.98       51.18
          2 |        973        9.73       60.91
          3 |        442        4.42       65.33
          4 |        519        5.19       70.52
          5 |        349        3.49       74.01
          6 |          6        0.06       74.07
          7 |          2        0.02       74.09
          8 |          2        0.02       74.11
          9 |        289        2.89       77.00
          A |          5        0.05       77.05
          B |          1        0.01       77.06
          C |         21        0.21       77.27
          D |          4        0.04       77.31
          E |          2        0.02       77.33
          F |         15        0.15       77.48
          G |          3        0.03       77.51
          H |          1        0.01       77.52
          J |      1,650       16.50       94.02
          K |        200        2.00       96.02
          L |         19        0.19       96.21
          N |          2        0.02       96.23
          O |          1        0.01       96.24
          P |          4        0.04       96.28
          R |          4        0.04       96.32
          S |         47        0.47       96.79
          T |          4        0.04       96.83
          U |          1        0.01       96.84
          V |          4        0.04       96.88
          W |        235        2.35       99.23
          X |          2        0.02       99.25
          Y |         47        0.47       99.72
          Z |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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