Madrid is an important centre for trade fairs, many of them coordinated by IFEMA, the Trade Fair Institution of Madrid. The public sector employs 18.1% of all employees. Madrid attracts about 8M tourists annually from other parts of Spain and from all over the world, exceeding even Barcelona. Spending by tourists in Madrid was estimated (2011) at €9,546.5M, or 7.7% of the city's GDP.