Frequencies for first 10,000 rows of prov1815 variable in pos1993 dataset :

   resident |
    program |
approved by |
        aoa |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,856       88.56       88.56
          N |      1,127       11.27       99.83
          Y |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016