Frequencies for first 10,000 rows of bonedens variable in nhamcsopd2006 dataset :

       bone |
    mineral |
    density |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,946       99.46       99.46
        Yes |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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