At 103 percent (UNESCO: 2010), South Korea has the highest tertiary gross enrollment ratio of any country in the world (total enrollment in tertiary education, regardless of age, expressed as a percentage of the total population of the five-year age group following on from secondary school), a statistic that is emblematic of the premium that is placed on education in the Republic of Korea. Sixty-five percent of Korean 25-34 year olds have attained tertiary education (OECD: 2010), while over 97 percent of that same age group has finished at least upper secondary education. By both measures, Korea ranks number one among OECD countries.