Frequencies for first 10,000 rows of ostprsis variable in namcs2005 dataset :

       does |
patient now |
     have - |
osteoporosi |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,722       97.22       97.22
          1 |        278        2.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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