The level of tertiary attainment in Poland is also high: about 75% of tertiary-educated adults have a master's or equivalent degree as their highest tertiary qualification, whereas the majority of tertiary-educated adults in OECD countries have only a bachelor's degree or equivalent. Following general OECD trends, labour-market opportunities increase with the level of tertiary attainment in Poland: about 93% of those with tertiary education at doctoral level are employed against 82% of those with a bachelor's degree. Only slightly more than half of the students undertake their studies full time.