Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        480        4.80        4.81
          1 |      2,395       23.95       28.76
          2 |      1,116       11.16       39.92
          3 |        865        8.65       48.57
          4 |        791        7.91       56.48
          5 |      1,478       14.78       71.26
          6 |        587        5.87       77.13
          7 |        522        5.22       82.35
          8 |        266        2.66       85.01
          9 |        497        4.97       89.98
          A |        149        1.49       91.47
          B |        197        1.97       93.44
          C |         74        0.74       94.18
          D |         43        0.43       94.61
          E |         38        0.38       94.99
          F |         26        0.26       95.25
          G |         12        0.12       95.37
          H |         27        0.27       95.64
          J |         40        0.40       96.04
          K |         21        0.21       96.25
          L |         29        0.29       96.54
          M |         50        0.50       97.04
          N |         19        0.19       97.23
          P |         18        0.18       97.41
          R |         56        0.56       97.97
          S |         62        0.62       98.59
          T |         17        0.17       98.76
          U |         20        0.20       98.96
          V |         19        0.19       99.15
          W |         27        0.27       99.42
          X |         31        0.31       99.73
          Y |         11        0.11       99.84
          Z |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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