Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

        vin |
character(6 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        446        4.46        4.46
          1 |      2,176       21.76       26.22
          2 |      1,157       11.57       37.79
          3 |        968        9.68       47.47
          4 |        914        9.14       56.61
          5 |      1,265       12.65       69.26
          6 |        577        5.77       75.03
          7 |        506        5.06       80.09
          8 |        267        2.67       82.76
          9 |        523        5.23       87.99
          A |        140        1.40       89.39
          B |        207        2.07       91.46
          C |         95        0.95       92.41
          D |         51        0.51       92.92
          E |         69        0.69       93.61
          F |         38        0.38       93.99
          G |         31        0.31       94.30
          H |         39        0.39       94.69
          J |         37        0.37       95.06
          K |         15        0.15       95.21
          L |         51        0.51       95.72
          M |         55        0.55       96.27
          N |         25        0.25       96.52
          O |          1        0.01       96.53
          P |         43        0.43       96.96
          Q |          1        0.01       96.97
          R |         47        0.47       97.44
          S |         71        0.71       98.15
          T |         17        0.17       98.32
          U |         18        0.18       98.50
          V |         23        0.23       98.73
          W |         41        0.41       99.14
          X |         45        0.45       99.59
          Y |         14        0.14       99.73
          Z |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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