Frequencies for first 10,000 rows of econds_4 variable in mortterr2007 dataset :

Sequence of |
  condition |
     within |
part/line 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,442       34.42       34.42
          2 |        299        2.99       37.41
          3 |         65        0.65       38.06
          4 |          2        0.02       38.08
          . |      6,192       61.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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