Question: When did the team that John Nyskohus played for 45 times leave the Oceania Football Confederation?

Context paragraphs:
John Nyskohus: John Nyskohus (born 15 October 1951) is an Australian former soccer player who played club football for USC Lion in the South Australian State League and Adelaide City in the National Soccer League.  He also played 45 times for Australia, including 25 in full international matches.

National under-21 football team: A National under-21 football team represents the second-highest stage in European international football competition.  Only Europe (UEFA) uses an under-21 age limit, and only for men.  FIFA, the sport's worldwide governing body, runs competitions for both men and women in the under-20 age group.  Among FIFA's continental confederations, CONCACAF and CONMEBOL hold U-20 championships for men, while the Asian Football Confederation (AFC) and Oceania Football Confederation (OFC) do not conduct U-20 championships, with their highest youth competitions for men being at under-19 level.  For women, UEFA and the AFC run under-19 championships instead of under-20; CONCACAF, CONMEBOL, and the OFC run under-20 championships; and the CAF's under-20 "championship" is strictly a World Cup qualifier and currently has no championship match, as that confederation receives more than one berth in the U-20 Women's World Cup.

Australia women's national under-20 soccer team: The Australian women's national under-20 soccer team represents Australia in international women's under-20 soccer.  The team is controlled by the governing body for soccer in Australia, Football Federation Australia (FFA), which is currently a member of the Asian Football Confederation (AFC) and the regional ASEAN Football Federation (AFF) since leaving the Oceania Football Confederation (OFC) in 2006.  The team's official nickname is the "Young Matildas".

Australia national beach soccer team: The Australia national beach soccer team represents Australia in international men's beach soccer.  The team is controlled by the governing body for association football in Australia, Football Federation Australia (FFA), which is currently a member of the Asian Football Confederation (AFC) and the regional ASEAN Football Federation (AFF) since leaving the Oceania Football Confederation (OFC) in 2006.  The team's official nickname is the "Beach Socceroos".

Australia national under-17 soccer team: The Australia national under-17 Football team represents Australia in men's international under-17 Football.  The team is controlled by the governing body for Football in Australia, Football Federation Australia (FFA), which is currently a member of the Asian Football Confederation (AFC) and the regional ASEAN Football Federation (AFF) since leaving the Oceania Football Confederation (OFC) in 2006.  The team's official nickname is the "Joeys".

Australia women's national soccer team: The Australian women's national soccer team represents Australia in international women's soccer at the senior level.  The team is overseen by the governing body for soccer in Australia, Football Federation Australia (FFA), which is currently a member of the Asian Football Confederation (AFC) and the regional ASEAN Football Federation (AFF) since leaving the Oceania Football Confederation (OFC) in 2006.  The team's official nickname is the Matildas (from the Australian folk song "Waltzing Matilda"), having been known as the Female Socceroos before 1995.  The current team manager is Alen Stajcic.

2008 OFC Nations Cup: The 2008 OFC Nations Cup was the eighth edition of the OFC Nations Cup, and the first under a new format that was introduced.  It took place as a series of as a home-and-away round-robin tournament on FIFA match dates in 2007 and 2008.  Doubling as the qualification tournament for the 2010 FIFA World Cup, the tournament was substantially different from earlier editions: 2004 champions Australia did not compete after leaving the Oceania Football Confederation for the Asian Football Confederation, and for the first time since the 1996 OFC Nations Cup, no fixed venue was used.  Unlike the 2004 OFC Nations Cup, which had featured ten teams from the Oceania Football Confederation, the 2008 tournament had just four teams.

1990 FIFA World Cup qualification: The qualification competition for the 1990 FIFA World Cup was a series of tournaments organised by the six FIFA confederations.  Each confederation — the Asian Football Confederation (AFC), Confederation of African Football (CAF), CONCACAF (North America), CONMEBOL (South America), Oceania Football Confederation (OFC), and UEFA (Europe) — was allocated a certain number of the 24 places at the tournament.  A total of 116 teams entered the competition, with Italy, as the host, and Argentina, as the holders, qualifying for the final tournament automatically.

2010 FIFA World Cup qualification (OFC): The 2010 FIFA World Cup qualification for the Oceania Football Confederation (OFC) selected New Zealand to compete in a two-legged home-and-away playoff against Bahrain, the fifth-place team from the Asian Football Confederation (AFC) for a spot in the 2010 FIFA World Cup in South Africa.  (Oceania is the only confederation that does not have an automatic place in the finals.)  Its final round was the 2008 OFC Nations Cup.  Consequently, New Zealand is also considered the OFC Nations Cup champion, and represented the OFC in the 2009 FIFA Confederations Cup.

Australia national soccer team: The Australian national soccer team represents Australia in international men's soccer.  Officially nicknamed the Socceroos, the team is controlled by the governing body for soccer in Australia, Football Federation Australia (FFA), which is currently a member of the Asian Football Confederation (AFC) and the regional ASEAN Football Federation (AFF) since leaving the Oceania Football Confederation (OFC) in 2006.

Supporting paragraphs: John Nyskohus Australia national soccer team
Answer: 2006