Frequencies for econds_7 variable in linkco1995us_unl dataset :

Sequence of |
  condition |
     within |
part/line 7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        703       99.29       99.29
          1 |          1        0.14       99.44
          2 |          1        0.14       99.58
          3 |          2        0.28       99.86
          4 |          1        0.14      100.00
------------+-----------------------------------
      Total |        708      100.00

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