Tuvalu:

While some commentators have called for the relocation of Tuvalu's population to Australia, New Zealand or Kioa in Fiji, in 2006 Maatia Toafa (Prime Minister from 2004–2006) said his government did not regard rising sea levels as such a threat that the entire population would need to be evacuated. In 2013 Enele Sopoaga, the prime minister of Tuvalu, said that relocating Tuvaluans to avoid the impact of sea level rise "should never be an option because it is self defeating in itself. For Tuvalu I think we really need to mobilise public opinion in the Pacific as well as in the [rest of] world to really talk to their lawmakers to please have some sort of moral obligation and things like that to do the right thing."

Please answer a question about this article. If the question is unanswerable, say "unanswerable". When did Prime Minster Maatia Toafa make his comments about not evacuating Tuvalu?
2006