Conversely, countries with the highest overall employment rates for 25-64 year-olds - Iceland, Norway, Sweden and Switzerland - also have some of the highest employment rates among women. Comparable information on occupations is available only for European countries and the United States. In these countries, at least half of all working women are concentrated in 11 of the 110 occupations listed by the International Labour Organization (ILO), while half of men work in more than twenty of them.