Instructions: This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.
Input: Passage: The Leaving Certificate, which is taken after two years of study, is the final examination in the secondary school system. Those intending to pursue higher education normally take this examination, with access to third-level courses generally depending on results obtained from the best six subjects taken, on a competitive basis. Third-level education awards are conferred by at least 38 Higher Education Institutions - this includes the constituent or linked colleges of seven universities, plus other designated institutions of the Higher Education and Training Awards Council. The Programme for International Student Assessment, coordinated by the OECD, currently ranks Ireland as having the fourth highest reading score, ninth highest science score and thirteenth highest mathematics score, among OECD countries, in its 2012 assessment. In 2012, Irish students aged 15 years had the second highest levels of reading literacy in the EU. Ireland also has 0.747 of the World's top 500 Universities per capita, which ranks the country in 8th place in the world. Primary, secondary and higher level education are all free in Ireland for all EU citizens. There are charges to cover student services and examinations. In addition, 37 percent of Ireland's population has a university or college degree, which is among the highest percentages in the world.
Question: How many OECD countries have a higher reading score than Ireland?
Answer type: Number
Output:
3.