Frequencies for first 10,000 rows of econds_11 variable in mort1975 dataset :

  econds_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
         01 |          1        0.01       99.94
         03 |          2        0.02       99.96
         04 |          1        0.01       99.97
         05 |          1        0.01       99.98
         06 |          1        0.01       99.99
         08 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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