Frequencies for first 10,000 rows of srvy_ever_nacrdtd_sw variable in pos1999 dataset :

    current |
survey ever |
 non-accred |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,784       87.84       87.84
          N |        888        8.88       96.72
          Y |        328        3.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017