In 2013 around 600,000 Berliners were registered in one of the more than 2,300 sport and fitness clubs. The city of Berlin operates more than 60 public indoor and outdoor swimming pools. Berlin is the largest Olympic training center in Germany. About 500 top athletes (15% of all German top athletes) are based there. Forty-seven elite athletes participated in the 2012 Summer Olympics. Berliners would achieve seven gold, twelve silver and three bronze medals.