Frequencies for first 10,000 rows of mednurse variable in nhamcsed2000 dataset :

medical/nur |
       sing |
  assistant |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,380       93.80       93.80
          1 |        620        6.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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