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

       FIRE |
 OCCURRENCE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,125       91.25       91.25
          1 |        260        2.60       93.85
          . |        615        6.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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