Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        200        2.00        2.01
          1 |        608        6.08        8.09
          2 |        452        4.52       12.61
          3 |        296        2.96       15.57
          4 |        236        2.36       17.93
          5 |        218        2.18       20.11
          6 |        100        1.00       21.11
          7 |        565        5.65       26.76
          8 |        132        1.32       28.08
          9 |        752        7.52       35.60
          A |        914        9.14       44.74
          B |      1,066       10.66       55.40
          C |        598        5.98       61.38
          D |        312        3.12       64.50
          E |        327        3.27       67.77
          F |        330        3.30       71.07
          G |        355        3.55       74.62
          H |        335        3.35       77.97
          J |        149        1.49       79.46
          K |         91        0.91       80.37
          L |        171        1.71       82.08
          M |        169        1.69       83.77
          N |        199        1.99       85.76
          P |        292        2.92       88.68
          R |        400        4.00       92.68
          S |        203        2.03       94.71
          T |         62        0.62       95.33
          U |         74        0.74       96.07
          V |         66        0.66       96.73
          W |         79        0.79       97.52
          X |         43        0.43       97.95
          Y |        138        1.38       99.33
          Z |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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