Frequencies for first 10,000 rows of primcare variable in nhamcsopd1997 dataset :

are you the |
  patient's |
    primary |
       care |
 physician? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,281       32.81       32.81
          2 |      5,867       58.67       91.48
          3 |        732        7.32       98.80
          4 |        120        1.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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