Frequencies for pvin_8 variable in parkwork dataset :

        vin |
character(8 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.09        0.09
          0 |         18        1.57        1.66
          1 |         29        2.53        4.19
          2 |         27        2.36        6.54
          3 |         34        2.97        9.51
          4 |         33        2.88       12.39
          5 |         43        3.75       16.14
          6 |         36        3.14       19.28
          7 |         11        0.96       20.24
          8 |         20        1.75       21.99
          9 |         67        5.85       27.84
          A |         25        2.18       30.02
          B |         42        3.66       33.68
          C |         44        3.84       37.52
          D |         50        4.36       41.88
          E |         59        5.15       47.03
          F |         41        3.58       50.61
          G |         44        3.84       54.45
          H |         30        2.62       57.07
          J |         15        1.31       58.38
          K |         60        5.24       63.61
          L |         41        3.58       67.19
          M |         11        0.96       68.15
          N |         43        3.75       71.90
          P |         28        2.44       74.35
          R |         61        5.32       79.67
          S |         34        2.97       82.64
          T |         29        2.53       85.17
          U |         20        1.75       86.91
          V |         28        2.44       89.35
          W |         46        4.01       93.37
          X |         47        4.10       97.47
          Y |         14        1.22       98.69
          Z |         15        1.31      100.00
------------+-----------------------------------
      Total |      1,146      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016