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

       FIRE |
 OCCURRENCE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,073       90.73       90.73
          1 |        239        2.39       93.12
          2 |         23        0.23       93.35
          . |        665        6.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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