Frequencies for first 10,000 rows of econds_4 variable in mort2006 dataset :

Sequence of |
  condition |
     within |
part/line 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,351       13.51       13.51
          2 |        671        6.71       20.22
          3 |        333        3.33       23.55
          4 |         25        0.25       23.80
          . |      7,620       76.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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