Frequencies for first 10,000 rows of rept_cod_num variable in demo2018q2 dataset :

          rept_cod_num |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
EXP Expedited (15-Day) |      6,525       65.25       65.25
          PER Periodic |      3,475       34.75      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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