The proportion of cross-border workers in domestic employment rose to 41% in 2007, of which 51% were French, 26% Belgian and 23% German. Services account for more than 75% of jobs, and financial services alone for 29%. Spending on education represented 3.7% of GDP. The proportion of the population with upper secondary or higher education (66% of persons between 25 and 64 years of age) is below the OECD average (68%). This explains why the participation rate may be higher than 100. Source: OECD Environment Directorate.