Frequencies for first 10,000 rows of physasst variable in nhamcsopd1993 dataset :

       phys |
 asst/nurse |
  prac seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,470       94.70       94.70
          1 |        530        5.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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