Frequencies for first 10,000 rows of rn variable in nhamcsopd2000 dataset :

 registered |
 nurse seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,730       47.30       47.30
          1 |      5,270       52.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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