Frequencies for pvin_10 variable in parkwork dataset :

        vin |
characters( |
        10) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.27        0.27
          0 |          3        0.27        0.55
          1 |         53        4.86        5.41
          2 |         60        5.50       10.91
          3 |         61        5.59       16.50
          4 |         64        5.87       22.36
          5 |         66        6.05       28.41
          6 |         75        6.87       35.29
          7 |         58        5.32       40.60
          8 |         58        5.32       45.92
          9 |         72        6.60       52.52
          A |         39        3.57       56.10
          B |         51        4.67       60.77
          C |         42        3.85       64.62
          D |          5        0.46       65.08
          E |          3        0.27       65.35
          F |          3        0.27       65.63
          G |          5        0.46       66.09
          H |          4        0.37       66.45
          J |          6        0.55       67.00
          K |         12        1.10       68.10
          L |          9        0.82       68.93
          M |         10        0.92       69.84
          N |         11        1.01       70.85
          P |          6        0.55       71.40
          R |         18        1.65       73.05
          S |         29        2.66       75.71
          T |         30        2.75       78.46
          V |         54        4.95       83.41
          W |         55        5.04       88.45
          X |         53        4.86       93.31
          Y |         73        6.69      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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