Frequencies for first 10,000 rows of services variable in nhamcsopd2009 dataset :

   were any |
screening/d |
iagnostic/n |
on-medicati |
         on |
  treatment |
   services |
ordered/pro |
      vided |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        470        4.70        4.70
          1 |      9,530       95.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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