Hanoi is the largest center of education in Vietnam. It is estimated that 62% of the scientists in the whole country are living and working in Hanoi. Admissions to undergraduate study are through entrance examinations, which are conducted annually and open to everyone (who has successfully completed his/her secondary education) in the country. The majority of universities in Hanoi are public, although in recent years a number of private universities have begun operation. Thăng Long University, founded in 1988, by Vietnamese mathematics professors in Hanoi and France was the first private university in Vietnam. Because many of Vietnam's major universities are located in Hanoi, students from other provinces (especially in the northern part of the country) wishing to enter university often travel to Hanoi for the annual entrance examination. Such events usually take place in June and July, during which a large number of students and their families converge on the city for several weeks around the intense examination period. In recent years, these entrance exams have been centrally coordinated by the Ministry of Education, but entrance requirements are decided independently by each university.