Frequencies for first 10,000 rows of npnmw variable in namcs2009 dataset :

      nurse |
pract/midwi |
    fe seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,685       96.85       96.85
        yes |        315        3.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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