takes three years. Students in the 12th grade take Government tests, which are also referred to as school-leaving exams. These tests are later used for university admissions. Among the oldest is also the Lviv University, founded in 1661. More higher education institutions were set up in the 19th century, beginning with universities in Kharkiv (1805), Kyiv (1834), Odesa (1865) and Chernivtsi (1875) and a number of professional higher education institutions, e.g.: Nizhyn Historical and Philological Institute (originally established as the Gymnasium of Higher Sciences in 1805), a Veterinary Institute (1873) and a Technological Institute (1885) in Kharkiv, a Polytechnic Institute in Kyiv (1898) and a Higher Mining School (1899) in Katerynoslav. Rapid growth followed in the Soviet period. By 1988 the number of higher education institutions increased to 146 with over 850,000 students. The Ukrainian higher education system comprises higher educational establishments, scientific and methodological facilities under national, municipal and self-governing bodies in charge of education. The organisation of higher education in Ukraine is built up in accordance with the structure of education of the world's higher developed countries, as is defined by UNESCO and the UN. Ukraine produces the fourth largest number of post-secondary graduates in Europe, while being ranked seventh in population. Higher education is either state funded or private. Most universities provide subsidised housing for out-of-city students. It is common for libraries to supply required books for all registered students. Ukrainian universities confer two degrees: the bachelor's degree (4 years) and the master's degree (5–6th year), in accordance with the Bologna process. Historically, Specialist degree (usually 5 years) is still also granted; it was the only degree awarded by universities in Soviet times. Ukraine was ranked 57th in 2022 in the Global Innovation Index, down from 49th in 2021 Regional differences Ukrainian is the dominant language in Western Ukraine and in Central Ukraine, while Russian is the dominant language in the cities of Eastern Ukraine and Southern Ukraine. In the Ukrainian SSR schools, learning Russian was mandatory; in modern Ukraine, schools with Ukrainian as the language of instruction offer classes in Russian and in the other minority languages. On the Russian language, on Soviet Union and Ukrainian nationalism, opinion in Eastern Ukraine and Southern Ukraine tends to be the exact opposite of those in Western Ukraine; while opinions in Central Ukraine on these topics tend be less extreme. Similar historical cleavages also remain evident at the level