The main factors that affect index are average grossnationproduct and the gross enrolment ratio in institutions of common higher education.
影响该指标的主要因素有人均国民产值和高等学校毛入学率。
2
A paradox of the debt crisis is that the 16-nation euro zone, as a whole, has a budget deficit of around 6% of its gross domestic product and total public debts of around 84% of GDP.