Frequencies for first 10,000 rows of econds_6 variable in mort1975 dataset :

   econds_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,070       90.70       90.70
         01 |        210        2.10       92.80
         02 |        345        3.45       96.25
         03 |        270        2.70       98.95
         04 |         81        0.81       99.76
         05 |         11        0.11       99.87
         06 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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