Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         48        0.48        0.48
          1 |        189        1.89        2.37
          2 |         80        0.80        3.17
          3 |         51        0.51        3.68
          4 |         15        0.15        3.83
          5 |         33        0.33        4.16
          6 |         30        0.30        4.46
          7 |         17        0.17        4.63
          8 |         43        0.43        5.06
          9 |        411        4.11        9.17
          A |        213        2.13       11.30
          B |        497        4.97       16.27
          C |        283        2.83       19.10
          D |         78        0.78       19.88
          E |         69        0.69       20.57
          F |      1,611       16.11       36.68
          G |      2,313       23.13       59.81
          H |        864        8.64       68.45
          J |        157        1.57       70.02
          K |        108        1.08       71.10
          L |        116        1.16       72.26
          M |        503        5.03       77.29
          N |        659        6.59       83.88
          P |        158        1.58       85.46
          Q |         14        0.14       85.60
          R |         37        0.37       85.97
          S |        147        1.47       87.44
          T |        738        7.38       94.82
          U |          4        0.04       94.86
          V |        121        1.21       96.07
          W |         40        0.40       96.47
          X |        179        1.79       98.26
          Y |        130        1.30       99.56
          Z |         44        0.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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