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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,653       66.53       66.53
          2 |      2,578       25.78       92.31
          3 |        483        4.83       97.14
          4 |        149        1.49       98.63
          5 |         56        0.56       99.19
          6 |         25        0.25       99.44
          7 |         14        0.14       99.58
          8 |         12        0.12       99.70
          9 |          7        0.07       99.77
         10 |          5        0.05       99.82
         11 |          3        0.03       99.85
         12 |          3        0.03       99.88
         13 |          1        0.01       99.89
         14 |          1        0.01       99.90
         15 |          1        0.01       99.91
         16 |          1        0.01       99.92
         17 |          1        0.01       99.93
         18 |          1        0.01       99.94
         19 |          1        0.01       99.95
         20 |          1        0.01       99.96
         21 |          1        0.01       99.97
         22 |          1        0.01       99.98
         23 |          1        0.01       99.99
         24 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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