Frequencies for first 10,000 rows of dplural variable in natl1976 dataset :

  Pluarlity |
  (1975 on) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,820       98.20       98.20
          2 |        177        1.77       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016