Helsinki is one of Europe's richest capitals. Contributing approximately a third of Finland's GDP, Helsinki profits on serviced-related IT and public sectors. Having moved from heavy industrial works, shipping companies also employ a substantial number of people. The city centre is the best choice for large investors to settle their businesses, as well as satellite branches of international companies. The central location supplies an adequate availability of highly qualified and skilled employers in Finland. Migration is in steady rate, as neighboring cities develop to their own industrialized peaks as well. Helsinki's tap water coming from the Päijänne Tunnel is valued potable water. It is bottled and sold to mid-eastern countries like Saudi Arabia.