Frequencies for first 10,000 rows of httake variable in nhamcsopd2009 dataset :

     height |
      taken |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      4,973       49.73       49.73
        yes |      5,027       50.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016