As of 2015, the IRAP-Ph.D. has seen the enrollment of 111 students : 1 from Albania, 3 from Argentina, 5 from Armenia, 1 from Austria, 2 from Belarus, 16 from Brazil, 5 from China, 9 from Colombia, 2 from Croatia, 5 from France, 5 from Germany, 7 from India, 2 from Iran, 34 from Italy, 2 from Kazakhstan, 1 from Mexico, 1 from Pakistan, 4 from Russia, 1 from Serbia, 1 from Sweden, 1 from Switzerland, 1 from Taiwan, 1 from Turkey, 1 from Ukraine.