Frequencies for first 10,000 rows of econds_3 variable in mortterr2007 dataset :

Sequence of |
  condition |
     within |
part/line 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,582       65.82       65.82
          2 |        389        3.89       69.71
          3 |         49        0.49       70.20
          . |      2,980       29.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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