Frequencies for first 10,000 rows of educsmsarflg variable in natl1970 dataset :

  Education |
 of Parents |
  (By SMSA) |
       flag |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,960       99.60       99.60
          1 |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016