Between 1971 and 1990, the percentage of Indonesia's population that lived in urban areas rose from 17% to 31%. In 1990 in Mexico, of every 1,000 infants younger than the age of one year, an average of 38 died. In 2010, the infant mortality rate was 14 of every 1,000. In Chad in 1991, for every 100 boys attending primary school, there were 45 girls. In 2009, for every 100 boys attending primary school, there were 70 girls. In Zambia in 2004, 5% of people with advanced HIV infection had access to lifesaving antiretroviral therapy. In 2009, 64% had access