Portugal is a developed and a high-income country, with a GDP per capita of 77% of the EU28 average in 2017 (increasing from 75% in 2012) and a HDI of 0.850 (the 40th highest) in 2018. By the end of 2018, Portugal's GDP (PPP) was $32,554 per capita, according to OECD's report. The national currency of Portugal is the euro (€), which replaced the Portuguese Escudo, and the country was one of the original member states of the eurozone. Portugal's central bank is the ''Banco de Portugal'', an integral part of the European System of Central Banks. Most industries, businesses and financial institutions are concentrated in the Lisbon and Porto metropolitan areas – the Setúbal, Aveiro, Braga, Coimbra, Leiria and Faro districts are the biggest economic centres outside these two main areas.