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

    Vehicle |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,365       13.65       13.65
          1 |      5,880       58.80       72.45
          2 |      2,203       22.03       94.48
          3 |        385        3.85       98.33
          4 |         93        0.93       99.26
          5 |         38        0.38       99.64
          6 |         10        0.10       99.74
          7 |          5        0.05       99.79
          8 |          4        0.04       99.83
          9 |          3        0.03       99.86
         10 |          3        0.03       99.89
         11 |          3        0.03       99.92
         12 |          3        0.03       99.95
         13 |          2        0.02       99.97
         14 |          2        0.02       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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