Frequencies for first 10,000 rows of econds_7 variable in linkco1991us_num dataset :

Sequence of |
  condition |
     within |
part/line 7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,881       98.81       98.81
          1 |         11        0.11       98.92
          2 |         31        0.31       99.23
          3 |         38        0.38       99.61
          4 |         32        0.32       99.93
          5 |          5        0.05       99.98
          6 |          1        0.01       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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