Frequencies for first 10,000 rows of dplural variable in natl2009 dataset :

  Plurality |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,721       97.21       97.21
          2 |        270        2.70       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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