Frequencies for first 10,000 rows of telconr variable in namcs2003 dataset :

did phys do |
        tel |
   consults |
  last full |
   wk prac? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,601       36.01       36.01
          1 |      5,248       52.48       88.49
          2 |      1,151       11.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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