Frequencies for first 10,000 rows of econds_9 variable in linkco1991us_num dataset :

Sequence of |
  condition |
     within |
part/line 9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,983       99.83       99.83
          1 |          1        0.01       99.84
          3 |          3        0.03       99.87
          4 |          5        0.05       99.92
          5 |          2        0.02       99.94
          6 |          5        0.05       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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