Frequencies for first 10,000 rows of ostprsis variable in namcs2012 dataset :

       Does |
patient now |
      have: |
Osteoporosi |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,719       97.19       97.19
        Yes |        281        2.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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