Frequencies for pvin_5 variable in parkwork dataset :

        VIN |
Character(5 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.10        0.10
          . |          1        0.10        0.20
          0 |          6        0.60        0.80
          1 |          2        0.20        1.00
          2 |          5        0.50        1.50
          3 |          2        0.20        1.70
          4 |          4        0.40        2.10
          5 |          6        0.60        2.69
          6 |          1        0.10        2.79
          7 |          2        0.20        2.99
          8 |          4        0.40        3.39
          9 |         48        4.79        8.18
          A |         65        6.49       14.67
          B |         42        4.19       18.86
          C |         86        8.58       27.45
          D |         76        7.58       35.03
          E |         35        3.49       38.52
          F |         55        5.49       44.01
          G |         33        3.29       47.31
          H |         12        1.20       48.50
          J |         21        2.10       50.60
          K |         60        5.99       56.59
          L |         41        4.09       60.68
          M |         44        4.39       65.07
          N |         26        2.59       67.66
          P |         74        7.39       75.05
          R |         32        3.19       78.24
          S |         46        4.59       82.83
          T |         22        2.20       85.03
          U |         56        5.59       90.62
          V |         14        1.40       92.02
          W |         33        3.29       95.31
          X |         28        2.79       98.10
          Y |         11        1.10       99.20
          Z |          8        0.80      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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