As of June 30, 2004, 14,773 questionnaires had been administered to 8,964 individuals (Table 1).
Three-quarters of participants are men (6,542/8,964) with an average age of 33. The average age of female participants is 28 (Table 1).
Educational levels are low, with only one in four (269/1,105) participants having completed high school (Table 3; 2003-04 data).