Frequencies for pvin_8 variable in parkwork dataset :

        vin |
character(8 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.27        0.27
          0 |          9        0.82        1.10
          1 |         40        3.67        4.77
          2 |         32        2.93        7.70
          3 |         31        2.84       10.54
          4 |         39        3.57       14.12
          5 |         44        4.03       18.15
          6 |         30        2.75       20.90
          7 |         18        1.65       22.55
          8 |         19        1.74       24.29
          9 |         44        4.03       28.32
          A |         23        2.11       30.43
          B |         30        2.75       33.18
          C |         37        3.39       36.57
          D |         34        3.12       39.69
          E |         51        4.67       44.36
          F |         37        3.39       47.75
          G |         43        3.94       51.70
          H |         17        1.56       53.25
          J |         20        1.83       55.09
          K |         56        5.13       60.22
          L |         38        3.48       63.70
          M |         28        2.57       66.27
          N |         30        2.75       69.02
          P |         27        2.47       71.49
          R |         56        5.13       76.63
          S |         28        2.57       79.19
          T |         30        2.75       81.94
          U |         37        3.39       85.33
          V |         42        3.85       89.18
          W |         39        3.57       92.76
          X |         40        3.67       96.43
          Y |         23        2.11       98.53
          Z |         16        1.47      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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