Frequencies for first 10,000 rows of cf2 variable in accident dataset :

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,855       98.55       98.55
          4 |          1        0.01       98.56
         14 |          9        0.09       98.65
         15 |          5        0.05       98.70
         16 |          1        0.01       98.71
         17 |          1        0.01       98.72
         18 |          1        0.01       98.73
         19 |         14        0.14       98.87
         20 |          4        0.04       98.91
         22 |          3        0.03       98.94
         99 |        106        1.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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