Frequencies for first 10,000 rows of hosvisr variable in namcs2002 dataset :

       Does |
  physician |
       make |
   hospital |
    visits? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      2,769       27.69       27.69
        Yes |      6,024       60.24       87.93
      Blank |      1,207       12.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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