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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,975       89.75       89.75
          2 |        817        8.17       97.92
          3 |         54        0.54       98.46
          4 |         78        0.78       99.24
          5 |         26        0.26       99.50
          8 |         17        0.17       99.67
          9 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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