3.6. The OECD (Organization for Economic Coop- eration and Development) consists of advanced, industrialized countries that accept the principles of representative democracy and a free market economy. Table 3.11 shows UN data for OECD nations on several variables: gross domestic prod- uct (GDP, per capita in U.S. dollars), percent unemployed, a measure of inequality based on comparing wealth of the richest 10% to the poorest 10%, public expenditure on health (as a percentage of the GDP), the number of physicians per 100,000 people, carbon dioxide emissions (per capita, in metric tons), the percentage of seats in parliament held by women, and female economic activity as?