Frequencies for qintrvmo variable in fmli011 dataset :

   qintrvmo |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      2,627       34.06       34.06
         02 |      2,550       33.07       67.13
         03 |      2,535       32.87      100.00
------------+-----------------------------------
      Total |      7,712      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016