Frequencies for first 10,000 rows of rept_cod variable in demo2007q3 dataset :

   Code for |
the type of |
     report |
  submitted |      Freq.     Percent        Cum.
------------+-----------------------------------
        DIR |        672        6.72        6.72
        EXP |      8,103       81.03       87.75
        PER |      1,225       12.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015