Frequencies for first 10,000 rows of osteopor variable in namcs1993 dataset :

       does |
    patient |
     have - |
osteoporosi |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,721       97.21       97.21
          1 |        279        2.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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