Frequencies for first 10,000 rows of edprn variable in nhamcsed1996 dataset :

  return to |
 ed, p.r.n. |
        (as |
needed)/app |
   ointment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,783       67.83       67.83
          1 |      3,217       32.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016