Frequencies for first 10,000 rows of edprn variable in nhamcsed1993 dataset :

  return to |
 ed, p.r.n. |
(as needed) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,572       75.72       75.72
          1 |      2,428       24.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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