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

      Light |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,363       43.63       43.63
          2 |      3,420       34.20       77.83
          3 |      1,830       18.30       96.13
          6 |        359        3.59       99.72
          9 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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