Question: what was the number of Tongan athletes that competed between after 2008 in 2011 commonwealth Youth Games?

Context articles: Barbados at the 2011 Commonwealth Youth Games
2011 Commonwealth Youth Games medal table
Tonga at the 2011 Commonwealth Youth Games
Malaysia at the 2011 Commonwealth Youth Games
India at the 2011 Commonwealth Youth Games
2008 Commonwealth Youth Games medal table
Canada at the 2011 Commonwealth Youth Games
Bangladesh at the 2011 Commonwealth Youth Games
2008 Commonwealth Youth Games
Dominica at the 2011 Commonwealth Youth Games

Barbados competed in the 2011 Commonwealth Youth Games (officially known as the IV Commonwealth Youth Games) held in the British Crown Dependency of Isle of Man from September 7 to 13, 2011.
 The nation was represented by the Barbados Olympic Association, which is responsible for the Commonwealth Games and Commonwealth Youth Games in Barbados.
The 2011 Commonwealth Youth Games, officially known as the IV Commonwealth Youth Games, were a multi-sport event held in the British Crown Dependency of Isle of Man from 7 to 13 September 2011.
 This was the first time in the history of the Commonwealth Youth Games that Games were organised in any island nation, and second time in any British Islands venue, after inaugural Games in Edinburgh, Scotland in 2000.
 At the Games, around 1,000 athletes between 14 and 18 years of age from 66 Commonwealth of Nations competed in seven sports.
Tonga competed in the 2011 Commonwealth Youth Games held in the British Crown Dependency of Isle of Man from 7 to 13 September 2011.
 Their participation marked their second Commonwealth Youth Games appearance.
 The delegation of Tonga consisted of three officials and four competitors (two men and two women) participating in three different sports— athletics, boxing and swimming.
 This was a decrease in the number of athletes from the nation's last appearance at the Games, when nine athletes were sent to the 2008 Commonwealth Youth Games in Pune.
 Heamasi Sekona won a bronze in the light heavyweight class of boxing without winning a single bout.
 Sekona was the only medalist from Tongan side.
 None of the rest three athletes advanced past the qualifying stages, and thus did not win any medals.
 Katiloka ranked eighth overall in the qualifying round for triple jump; middleweight boxer, Pomale, lost to Cody Crowley of Canada in his first round match.
 Additionally, Prescott ranked 18th and 13th in the heat rounds of 50 m and 100 m backstroke events respectively.
 Sekona's was the first medal for Tonga in the history of the Games.
Malaysia participated in the 2011 Commonwealth Youth Games held in the British Crown Dependency of Isle of Man from 7 to 13 September 2011.
 Their participation marked their fourth Commonwealth Youth Games appearance, one of the highest among the Commonwealth of Nations.
 Malaysia was represented by the Olympic Council of Malaysia, which is responsible for Malaysian participation in the multi-sport events, including Commonwealth Games and Commonwealth Youth Games.
 Malaysian delegation consisted of 18 athletes competed in four different sports— athletics, badminton, cycling, and swimming.
 This was an increase in the number of athletes from the nation's last appearance at the Games, when 10 athletes were sent to the 2008 Commonwealth Youth Games in Pune.
 Malaysia dominated in the badminton events, winning all but one of the five gold medals on offer, the only other gold was won by P. V. Sindhu of India in women's singles.
 All the medals came from badminton.
India competed at the 2011 Commonwealth Youth Games (officially known as the IV Commonwealth Youth Games) held in the Isle of Man from 7 to 13 September 2011.
 India has participated in all the editions of the Commonwealth Youth Games.
 The nation was represented by the Indian Olympic Association, which is responsible for the Commonwealth Games and Commonwealth Youth Games in India.
The 2008 Commonwealth Youth Games, officially known as the III Commonwealth Youth Games, were a multi-sport event held in the Indian city of Pune from 12 to 18 October 2008.
 This was the first time in the history of the Commonwealth Youth Games that the Games were organised in Asia.
 At the Games, 1220 athletes between 14 and 18 years of age from 71 Commonwealth of Nations competed in nine sports.
Canada competed at the 2011 Commonwealth Youth Games held in the British Crown Dependency of Isle of Man from 7 to 13 September 2011.
 Their participation marked their third Commonwealth Youth Games appearance.
 Canada was represented by the Commonwealth Games Canada, the association which is responsible for Commonwealth Games and Commonwealth movement in Canada.
 The delegation of 70 people included 56 competitors and 14 coaches and supporting staff.
Bangladesh competed in the 2011 Commonwealth Youth Games (officially known as the IV Commonwealth Youth Games) held in the Isle of Man from 7 to 13 September 2011.
 This was their second appearance in the Commonwealth Youth Games.
 The nation was represented by the Bangladesh Olympic Association, which is responsible for the Commonwealth Games and Commonwealth Youth Games in Bangladesh.
The 2008 Commonwealth Youth Games were held in Pune, India, a city in the state of Maharashtra.
 They were the third Commonwealth Youth Games, which are held every four years; they were the first Commonwealth Youth Games to be held in Asia.
Dominica competed in the 2011 Commonwealth Youth Games held in the British Crown Dependency of Isle of Man from September 7 to 13, 2011.
 Their participation marked their second Commonwealth Youth Games appearance.
 The Dominican delegation consisted of four competitors (two men and two women) who competed in two different sports.
 This was a decrease in the number of athletes from the nation's last appearance at the Games, when five athletes were sent to Pune.
 Shanica Yankey won a bronze medal in the javelin throw with a best throw of 38.08 m. Yankey was the only medal winner for Dominica, and the country finished last in the medal table, in 22nd position, sharing the position with nine other Commonwealth Games Associations.
 Yankey's was the first medal for Dominica in the history of the Games.