Passage: Rösler joined the FDP and its political youth organization, the Young Liberals, in 1992. He was secretary of the FDP in the state of Lower Saxony from 2000 to 2004 and served as chairman of the FDP parliamentary group in the Lower Saxon state assembly from 2003. From 2001 to 2006, Rösler was a member in the regional assembly of Hanover (district), where he was also deputy chairman of the parliamentary group. In May 2005, he was elected an observer of the federal FDP executive committee. He received 95% of the votes, the best result of that party conference. At the state party conference in March 2006, Rösler was elected as chairman of the Lower Saxon FDP with 96.4% of the votes; he succeeded Walter Hirche, who had decided to step down after twelve years at the helm. In April, 2008, Rösler was confirmed as the Lower Saxon FDP party chairman, receiving 95% of the votes.

Question: When did Rosler join the Young Liberals?
1992