Frequencies for pvin_8 variable in parkwork dataset :

        vin |
character(8 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          2        0.18        0.18
          0 |         10        0.92        1.10
          1 |         32        2.94        4.04
          2 |         29        2.66        6.70
          3 |         34        3.12        9.83
          4 |         28        2.57       12.40
          5 |         33        3.03       15.43
          6 |         24        2.20       17.63
          7 |         21        1.93       19.56
          8 |         21        1.93       21.49
          9 |         37        3.40       24.89
          A |         20        1.84       26.72
          B |         20        1.84       28.56
          C |         38        3.49       32.05
          D |         36        3.31       35.35
          E |         49        4.50       39.85
          F |         37        3.40       43.25
          G |         53        4.87       48.12
          H |         17        1.56       49.68
          J |         21        1.93       51.61
          K |         76        6.98       58.59
          L |         37        3.40       61.98
          M |         24        2.20       64.19
          N |         39        3.58       67.77
          P |         32        2.94       70.71
          R |         56        5.14       75.85
          S |         38        3.49       79.34
          T |         43        3.95       83.29
          U |         30        2.75       86.04
          V |         32        2.94       88.98
          W |         38        3.49       92.47
          X |         34        3.12       95.59
          Y |         36        3.31       98.90
          Z |         12        1.10      100.00
------------+-----------------------------------
      Total |      1,089      100.00

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