Frequencies for pvin_8 variable in parkwork dataset :

        VIN |
Character(8 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.30        0.30
          0 |         15        1.50        1.80
          1 |         22        2.20        3.99
          2 |         27        2.69        6.69
          3 |         32        3.19        9.88
          4 |         49        4.89       14.77
          5 |         28        2.79       17.56
          6 |         23        2.30       19.86
          7 |         19        1.90       21.76
          8 |         17        1.70       23.45
          9 |         50        4.99       28.44
          A |         17        1.70       30.14
          B |         40        3.99       34.13
          C |         33        3.29       37.43
          D |         27        2.69       40.12
          E |         56        5.59       45.71
          F |         25        2.50       48.20
          G |         25        2.50       50.70
          H |         16        1.60       52.30
          J |         20        2.00       54.29
          K |         59        5.89       60.18
          L |         24        2.40       62.57
          M |         25        2.50       65.07
          N |         38        3.79       68.86
          P |         28        2.79       71.66
          R |         42        4.19       75.85
          S |         22        2.20       78.04
          T |         31        3.09       81.14
          U |         27        2.69       83.83
          V |         21        2.10       85.93
          W |         54        5.39       91.32
          X |         50        4.99       96.31
          Y |         28        2.79       99.10
          Z |          9        0.90      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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