Frequencies for first 10,000 rows of services variable in namcs2011 dataset :

  Were any diag/screening/non-med |
    treatment services ordered or |
                        provided? |      Freq.     Percent        Cum.
----------------------------------+-----------------------------------
        No services were reported |        256        2.56        2.56
At least one service was reported |      9,744       97.44      100.00
----------------------------------+-----------------------------------
                            Total |     10,000      100.00

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