Frequencies for first 10,000 rows of services variable in nhamcsopd2010 dataset :

   were diag/screening/nonmed |
treatment services ordered or |
                    provided? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
         no services reported |        538        5.38        5.38
one or more services reported |      9,462       94.62      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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