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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         27        0.27        0.27
          1 |        111        1.11        1.38
          2 |         72        0.72        2.10
          3 |         45        0.45        2.55
          4 |         16        0.16        2.71
          5 |         23        0.23        2.94
          6 |         13        0.13        3.07
          7 |          9        0.09        3.16
          8 |         36        0.36        3.52
          9 |        356        3.56        7.08
          A |        197        1.97        9.05
          B |        623        6.23       15.28
          C |        210        2.10       17.38
          D |         63        0.63       18.01
          E |         54        0.54       18.55
          F |      1,869       18.69       37.24
          G |      2,294       22.94       60.18
          H |        936        9.36       69.54
          J |        185        1.85       71.39
          K |         95        0.95       72.34
          L |         98        0.98       73.32
          M |        454        4.54       77.86
          N |        622        6.22       84.08
          P |        148        1.48       85.56
          Q |          2        0.02       85.58
          R |         23        0.23       85.81
          S |        150        1.50       87.31
          T |        686        6.86       94.17
          U |         10        0.10       94.27
          V |        170        1.70       95.97
          W |         27        0.27       96.24
          X |        164        1.64       97.88
          Y |        150        1.50       99.38
          Z |         61        0.61       99.99
          g |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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