Israel has won nine Olympic medals since its first win in 1992, including a gold medal in windsurfing at the 2004 Summer Olympics. Israel has won over 100 gold medals in the Paralympic Games and is ranked 20th in the all-time medal count. The 1968 Summer Paralympics were hosted by Israel. The Maccabiah Games, an Olympic-style event for Jewish and Israeli athletes, was inaugurated in the 1930s, and has been held every four years since then. Israeli tennis champion Shahar Pe'er ranked 11th in the world on 31 January 2011. Krav Maga, a martial art developed by Jewish ghetto defenders during the struggle against fascism in Europe, is used by the Israeli security forces and police. Its effectiveness and practical approach to self-defense, have won it widespread admiration and adherence around the world.