Frequencies for first 10,000 rows of share variable in nhamcsopd2004 dataset :

   do other |
 physicians |
 share care |
        for |
   problem? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        140        1.40        1.40
        yes |      4,455       44.55       45.95
         no |      4,005       40.05       86.00
    unknown |      1,400       14.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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