Frequencies for first 10,000 rows of dplural variable in natl2013 dataset :

  Plurality |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,724       97.24       97.24
          2 |        276        2.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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