Frequencies for first 10,000 rows of telconr variable in namcs2004 dataset :

did phys do |
        tel |
   consults |
  last full |
   wk prac? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,672       36.72       36.72
          1 |      5,112       51.12       87.84
          2 |      1,216       12.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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