Frequencies for first 10,000 rows of econds_5 variable in mort1975 dataset :

   econds_5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,924       79.24       79.24
         01 |        779        7.79       87.03
         02 |        902        9.02       96.05
         03 |        303        3.03       99.08
         04 |         65        0.65       99.73
         05 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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