Frequencies for first 10,000 rows of telephon variable in nhamcsopd2007 dataset :

  telephone |
  follow up |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,832       98.32       98.32
        yes |        168        1.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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