Frequencies for first 10,000 rows of land_use variable in accident dataset :

   Land Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,039       40.39       40.39
          2 |      5,958       59.58       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016