Tiny qatar 's population trebled between 2000 and 2010 .
小小的卡塔尔在2000年至2010年间人口增长了三倍。
The same thing happened when fees trebled in 2006 .
2006年学费翻三倍时也发生过同样的情况。
Hunting was allowed again in 1975 , but the population has still trebled in the last 30 years and continues to grow at more than five per cent a year .
