The health of women and young females is of particular concern because, in many societies, they are disadvantaged by discrimination which is rooted in sociocultural traditions. Some of the health and social services these traditions prevent females from accessing are: equal power relationships between men and women; social norms that increase education and paid employment opportunities; an inclusive focus on women’s reproductive roles. They also still experience potential or actual physical, sexual and emotional violence. Worldwide, women live an average four years longer than men. In 2011, a woman's life expectancy at birth was more than 80 years in 46 countries, but only 58 years in the WHO African Region. Almost all (99%) of the approximate 287,000 maternal deaths every year occur in developing countries. Globally, cardiovascular disease, often thought to be a "male" problem, is the number one killer of women. Breast cancer is the leading cancer killer among women aged 20–59 years worldwide