The Czech Republic has been a member of NATO since 1999 and the EU since 2004. As of 2009, it held the EU Presidency. The vast majority of residents are Czech, with minorities including Slovak, Polish, Vietnamese, and Roma. Prague is the capital and largest city, as well as a cultural and economic center for over 1100 years. Prague Airport is one of the busiest in Central Europe. Football and ice hockey are the most popular sports, while traditional Czech music has roots in opera and folk traditions.