Frequencies for first 10,000 rows of econdp_10 variable in mort1975 dataset :

  econdp_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
          3 |          1        0.01        0.02
          4 |          4        0.04        0.06
          5 |         35        0.35        0.41
          . |      9,959       99.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015