• More than one-third of the adult population has tertiary (university) education in Canada, Japan, the United States, and Denmark.
• In Mexico, Portugal, and Spain, more than half of the adult population has less than upper secondary education.

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NOTE: 2003 for Japan. The adult population is defined as persons ages 25 to 64. Below upper secondary education is equivalent to less than high school. Upper secondary and post-secondary non-tertiary education is equivalent to high school and also includes trade school. Tertiary education is equivalent to higher education provided by a college or university.

SOURCE: Organization for Economic Cooperation and Development.