Frequencies for first 10,000 rows of dplural variable in natl1977 dataset :

  Plurality |
  (1975 on) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,792       97.92       97.92
          2 |        208        2.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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