Tourism has been a key element of the economic activity in the country and one of the country's most important sectors, contributing 20.6% of the gross domestic product as of 2018. Greece welcomed over 28 million visitors in 2016, which is an increase from the 26.5 million tourists it welcomed in 2015 and the 19.5 million in 2009, and the 17.7 million tourists in 2007, making Greece one of the most visited countries in Europe in the recent years.