Frequencies for first 10,000 rows of road_fnc variable in person dataset :

    Roadway |
   Function |
      Class |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        911        9.11        9.11
          2 |      1,078       10.78       19.89
          3 |      1,138       11.38       31.27
          4 |      1,392       13.92       45.19
          5 |        173        1.73       46.92
          6 |        916        9.16       56.08
          9 |          5        0.05       56.13
         11 |        504        5.04       61.17
         12 |        365        3.65       64.82
         13 |      1,588       15.88       80.70
         14 |      1,052       10.52       91.22
         15 |        264        2.64       93.86
         16 |        614        6.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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