Frequencies for doa variable in person dataset :

    DEAD ON |
    ARRIVAL |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        826       76.69       76.69
          7 |        251       23.31      100.00
------------+-----------------------------------
      Total |      1,077      100.00

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