2013, 16.9% of the total tertiary enrollment in Switzerland came from outside the country, a rate that is the 10th highest of the 291 countries included in the UNESCO Institute for Statistics. This rate was just higher than Austria (16.8) and just lower than the United Kingdom (17.5). However, due to the much smaller tertiary system in Switzerland their 47,000 foreign tertiary enrollments are dwarfed by much larger countries such as the United States (740,000), the United Kingdom (416,000), France (228,000) and Germany (196,000). Many international students attend Swiss universities for advanced degrees. In 2013 masters programs enrolled about 27% foreign students (fourth highest rate) and doctoral programs were 52% foreign (second behind Luxembourg). Switzerland also has a high rate of PhD students and inhabitants with doctoral degrees. In 2014 Switzerland had the highest rate of inhabitants (2.98%) with doctoral degrees in the world. In 2010, with 2.5%, Switzerland had the second-highest rate of inhabitants with doctoral degrees in Europe. In 2008, the number of students graduating with a PhD was 3209 (up from 2822 in 2000) of which 45% were foreigners (up from 31% in 2000). Educational rankings In 1995 Switzerland took part in the Trends in International Mathematics and Science Study (TIMSS) assessment. TIMSS is an international assessment of the mathematics and science knowledge of fourth- and eighth-grade students around the world. It was developed by the International Association for the Evaluation of Educational Achievement (IEA) to allow participating nations to compare students' educational achievement across borders. In 1995, Switzerland was one of forty-one nations that participated in the study. They did not participate in later studies. Among 8th graders, Switzerland ranked 15th overall, 8th in math and 25th in science. A National Center for Education Statistics (NCES) study that used the TIMSS assessment among 12th graders found similar results. The Swiss students were in their upper secondary education and were attending either a gymnasium, general education, teacher training or advanced vocation training. In math, the Swiss scored a 540 (the average score was 500), and were 3rd out of 21. Their science score was 523, which was 8th out of 21. In physics, they scored 488 (the average was 501) and were tied for 9th place out of 16. The advanced mathematics score was 533 which was 3rd out of 16. The World Economic Forum's Global Competitiveness Report for 2010-11 ranked Switzerland as first overall. Under the