Frequencies for first 10,000 rows of telephon variable in nhamcsopd2006 dataset :

  telephone |
  follow up |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,668       96.68       96.68
        Yes |        332        3.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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