Frequencies for first 10,000 rows of anyimage variable in nhamcsed2010 dataset :

    Was any |
    imaging |
 ordered or |
  performed |
     at the |
     visit? |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      5,358       53.58       53.58
        yes |      4,642       46.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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