Frequencies for first 10,000 rows of nursepr variable in nhamcsopd1999 dataset :

      nurse |
practitione |
     r seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,751       97.51       97.51
          1 |        249        2.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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