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Youth prevalence remains much lower with 7 % of females and 2 % of males aged 15-19 infected ; although prevalence rises significantly among those aged 20-24 ( women 16 % , men 4 % ) . It was observed that acid leaching resulted in recovery of about 95 % of lithium but the leach liquor contained a high proportion of iron . Sexual dysfunction occurs in 6 % of females and is manifest by dyspareunia or psychological aversion to intercourse for fear of stool leakage ( Meagher , 1998 ) . The RBD expressed as the standard deviation from that of the mean for age and sex matched controls was > or = 2 SD below the mean in 39 % of females and in 40 % of males . " answered " the parents " ( 64 % of females and 55 % of males ) , about 25 % of each sex wanted to take part in the decision . In English Language Arts for elementary and middle school grades , about 65 % of white and Asian students compared to only about 35 % of black and Hispanic students met standards on the city and state tests last year . A common polymorphism of MTHFR known as the TT genotype results in about a 70 % reduction of enzyme activity and occurs in 10-12 % of white and Asian populations . When we joined the coop , our claims administration costs ( with the same claims administrator ) were just under 5 % of claims and we dropped the broker agent for another savings of 1 % of claims . Breathing " events " were scored during sleep if total inspiratory volume went below 50 % of baseline and was associated with a 3 % decrease in blood oxygen levels [ 28,33,34 ] .