The centre-right government of former prime minister José María Aznar worked successfully to gain admission to the group of countries launching the euro in 1999. Unemployment stood at 17.1% in June 2017, below Spain's early 1990s unemployment rate of at over 20%. The youth unemployment rate (35% in March 2018) is extremely high compared to EU standards. Perennial weak points of Spain's economy include a large informal economy, and an education system which OECD reports place among the poorest for developed countries, along with the United States.