Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         38        0.38        0.38
          1 |      1,100       11.00       11.38
          2 |        480        4.80       16.18
          3 |        547        5.47       21.65
          4 |        877        8.77       30.42
          5 |         42        0.42       30.84
          6 |        229        2.29       33.13
          7 |        283        2.83       35.96
          8 |        265        2.65       38.61
          9 |        298        2.98       41.59
          A |        853        8.53       50.12
          B |        216        2.16       52.28
          C |        485        4.85       57.13
          D |        541        5.41       62.54
          E |        190        1.90       64.44
          F |         82        0.82       65.26
          G |        400        4.00       69.26
          H |        135        1.35       70.61
          J |         33        0.33       70.94
          K |        255        2.55       73.49
          L |         74        0.74       74.23
          M |        613        6.13       80.36
          N |        478        4.78       85.14
          P |         93        0.93       86.07
          R |         19        0.19       86.26
          S |         66        0.66       86.92
          T |        726        7.26       94.18
          U |        214        2.14       96.32
          V |         96        0.96       97.28
          W |         86        0.86       98.14
          X |        129        1.29       99.43
          Y |         29        0.29       99.72
          Z |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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