Frequencies for first 10,000 rows of npnmw variable in nhamcsopd2009 dataset :

      nurse |
practitione |
  r/midwife |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,097       90.97       90.97
        yes |        903        9.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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