Frequencies for first 10,000 rows of prov3545 variable in pos1993 dataset :

    current |
survey ever |
 accredited |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,743       87.43       87.43
          N |        304        3.04       90.47
          Y |        953        9.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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