Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         49        0.49        0.49
          1 |        324        3.24        3.73
          2 |         11        0.11        3.84
          3 |         17        0.17        4.01
          4 |         39        0.39        4.40
          5 |         59        0.59        4.99
          6 |         17        0.17        5.16
          7 |         21        0.21        5.37
          8 |         12        0.12        5.49
          9 |        296        2.96        8.45
          A |        597        5.97       14.42
          B |        695        6.95       21.37
          C |        813        8.13       29.50
          D |        623        6.23       35.73
          E |      1,006       10.06       45.79
          F |        755        7.55       53.34
          G |        612        6.12       59.46
          H |        670        6.70       66.16
          J |        304        3.04       69.20
          K |        238        2.38       71.58
          L |        205        2.05       73.63
          M |        104        1.04       74.67
          N |        254        2.54       77.21
          P |        191        1.91       79.12
          R |        451        4.51       83.63
          S |        343        3.43       87.06
          T |         82        0.82       87.88
          U |         72        0.72       88.60
          V |        153        1.53       90.13
          W |        317        3.17       93.30
          X |         27        0.27       93.57
          Y |        230        2.30       95.87
          Z |        413        4.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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