Frequencies for first 10,000 rows of prov1815 variable in pos1995 dataset :

   resident |
    program |
approved by |
        aoa |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,933       89.33       89.33
          N |      1,051       10.51       99.84
          Y |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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