Frequencies for first 10,000 rows of vin_11 variable in vehicle dataset :

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        144        1.44        1.44
          0 |        593        5.93        7.37
          1 |        353        3.53       10.90
          2 |        297        2.97       13.87
          3 |        131        1.31       15.18
          4 |        168        1.68       16.86
          5 |        201        2.01       18.87
          6 |        220        2.20       21.07
          7 |        239        2.39       23.46
          8 |        240        2.40       25.86
          9 |        502        5.02       30.88
          A |        433        4.33       35.21
          B |        193        1.93       37.14
          C |        614        6.14       43.28
          D |        210        2.10       45.38
          E |        298        2.98       48.36
          F |        290        2.90       51.26
          G |        187        1.87       53.13
          H |        529        5.29       58.42
          J |        221        2.21       60.63
          K |        309        3.09       63.72
          L |        330        3.30       67.02
          M |        260        2.60       69.62
          N |        210        2.10       71.72
          P |        316        3.16       74.88
          R |        229        2.29       77.17
          S |        321        3.21       80.38
          T |        216        2.16       82.54
          U |        489        4.89       87.43
          V |         47        0.47       87.90
          W |        253        2.53       90.43
          X |        161        1.61       92.04
          Y |        265        2.65       94.69
          Z |        531        5.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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