Frequencies for emer_use variable in person dataset :

  EMERGENCY |
        USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,036       80.81       80.81
          . |        246       19.19      100.00
------------+-----------------------------------
      Total |      1,282      100.00

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