Frequencies for first 10,000 rows of rept_cod_num variable in demo2017q2 dataset :

          rept_cod_num |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
EXP Expedited (15-Day) |      5,334       53.34       53.34
          PER Periodic |      4,666       46.66      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Feb 2018