Frequencies for rx_ce_lti_rxhcc68 variable in rxcoeff dataset :

rx_ce_lti_r |
  xhcc68 -- |
    mild or |
unspecified |
     mental |
retardation |
/developmen |
 tal disabi |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

by Jean Roth , jroth@nber.org , 2 May 2016