Frequencies for first 10,000 rows of nursprac variable in nhamcsopd1992 dataset :

      Nurse |
practitione |
     r seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,543       95.43       95.43
          1 |        457        4.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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