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

  does this |
     clinic |
      offer |
   cervical |
     cancer |
 screening? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,951       29.51       29.51
          2 |      1,731       17.31       46.82
          3 |        104        1.04       47.86
          8 |      4,851       48.51       96.37
          9 |        363        3.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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