Frequencies for first 10,000 rows of rept_cod variable in demo2009q1 dataset :

   Code for |
the type of |
     report |
  submitted |      Freq.     Percent        Cum.
------------+-----------------------------------
        DIR |      1,030       10.30       10.30
        EXP |      7,232       72.32       82.62
        PER |      1,738       17.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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