Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

        VIN |
Characters( |
        10) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         34        0.34        0.34
          0 |         20        0.20        0.54
          1 |        629        6.29        6.83
          2 |        595        5.95       12.78
          3 |        651        6.51       19.29
          4 |        653        6.53       25.82
          5 |        666        6.66       32.48
          6 |        688        6.88       39.36
          7 |        663        6.63       45.99
          8 |        516        5.16       51.15
          9 |        719        7.19       58.34
          A |        273        2.73       61.07
          B |        276        2.76       63.83
          C |         41        0.41       64.24
          D |         16        0.16       64.40
          E |         23        0.23       64.63
          F |         28        0.28       64.91
          G |         38        0.38       65.29
          H |         49        0.49       65.78
          J |         54        0.54       66.32
          K |         72        0.72       67.04
          L |        121        1.21       68.25
          M |        134        1.34       69.59
          N |        137        1.37       70.96
          P |        163        1.63       72.59
          R |        231        2.31       74.90
          S |        329        3.29       78.19
          T |        285        2.85       81.04
          U |          1        0.01       81.05
          V |        374        3.74       84.79
          W |        442        4.42       89.21
          X |        513        5.13       94.34
          Y |        566        5.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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