the Counter-Reformation implemented by the Habsburg dynasty, which controlled the region. It only survived in the easternmost regions due to protection of Hungarian nobles, who often happened to be Calvinist themselves. Today, a significant Lutheran minority lives in the easternmost region of Prekmurje, where they represent around a fifth of the population and are headed by a bishop with the seat in Murska Sobota. The third largest denomination, with around 2.2% of the population, is the Eastern Orthodox Church, with most adherents belonging to the Serbian Orthodox Church while a minority belongs to the Macedonian and other Eastern Orthodox churches. According to the 2002 census, Islam is the second largest religious denomination in the country, with around 2.4% of the population. Most Slovenian Muslims came from Bosnia. Slovenia has long been home to a Jewish community. Despite the losses suffered during the Holocaust, Judaism still numbers a few hundred adherents, mostly living in Ljubljana, site of the sole remaining active synagogue in the country. In the 2002, around 10% of Slovenes declared themselves as atheists, another 10% professed no specific denomination, and around 16% decided not to answer the question about their religious affiliation. According to the Eurobarometer Poll 2010, 32% of Slovenian citizens responded that "they believe there is a god", whereas 36% answered that "they believe there is some sort of spirit or life force" and 26% that "they do not believe there is any sort of spirit, god, or life force". Education Slovenia's education ranks as the 12th best in the world and 4th best in the European Union, being significantly higher than the OECD average, according to the Programme for International Student Assessment. Among people age 25 to 64, 12% have attended higher education, while on average Slovenes have 9.6 years of formal education. According to an OECD report, 83% of adults ages 25–64 have earned the equivalent of a high school degree, well above the OECD average of 74%; among 25- to 34-year-olds, the rate is 93%. According to the 1991 census there is 99.6% literacy in Slovenia. Lifelong learning is also increasing. Primary Responsibility for education oversight at primary and secondary level in Slovenia lies with the Ministry of Education and Sports. After non-compulsory pre-school education, children enter the nine-year primary school at the age of six. Primary school is divided into three periods, each of three years. In the academic year 2006–2007 there