Frequencies for first 10,000 rows of econds_10 variable in mort1975 dataset :

  econds_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,959       99.59       99.59
         02 |          5        0.05       99.64
         03 |          8        0.08       99.72
         04 |          8        0.08       99.80
         05 |          8        0.08       99.88
         06 |          2        0.02       99.90
         07 |          8        0.08       99.98
         08 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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