December 2004, the Indian Ocean tsunami occurred. In addition to the human toll, it impacted the first-quarter Thai GDP in 2005. The Yellow Shirts, a coalition of protesters against Thaksin, also emerged in 2005. In 2006, Thaksin dissolved the parliament and called for a general election. The April 2006 general election was boycotted by the main opposition parties. Thaksin's party won again, but the election was declared invalid by the Constitutional Court. Another general election, scheduled for October 2006, was cancelled. On 19 September a group of soldiers calling themselves the Council for Democratic Reform under the Constitutional Monarchy and led by Sonthi Boonyaratglin organized a coup, ousting Thaksin while he was in New York preparing for a speech at the United Nations General Assembly. During the last year of the second Thaksin government, the Thai GDP grew by 5.1 percent. Under his governments, Thailand's overall ranking in the IMD Global Competitiveness Scoreboard rose from 31st in 2002 to 25th in 2005 before falling to 29th in 2006. After the coup, Thailand's economy again suffered. From the last quarter of 2006 through 2007, the country was ruled by a military junta led by General Surayud Chulanont, who was appointed prime minister in October 2006. The 2006 GDP growth rate slowed from 6.1, 5.1 and 4.8 percent year-over-year in the first three-quarters to 4.4 percent (YoY) in Q4. Thailand's ranking on the IMD Global Competitiveness Scoreboard fell from 26th in 2005 to 29th in 2006 and 33rd in 2007. Thaksin's plan for massive infrastructure investments was unmentioned until 2011, when his younger sister Yingluck Shinawatra entered office. In 2007, the Thai economy grew by 5 percent. On 23 December 2007, the military government held a general election. The pro-Thaksin People's Power Party, led by Samak Sundaravej, won a landslide victory over Abhisit Vejjajiva's Democrat Party. Under the People's Power Party-led government the country fell into political turmoil. This, combined with the financial crisis of 2007–2008 cut the 2008 Thai GDP growth rate to 2.5%. Before the People's Alliance for Democracy (PAD) and the Yellow Shirts reconvened in March 2008, the GDP grew by 6.5 percent (YoY) in the first quarter of the year. Thailand's ranking on the IMD World Competitiveness Scoreboard rose from 33rd in 2007 to 27th in 2008. The Yellow Shirts occupied the Government House of Thailand in August 2008, and on 9 September the Constitutional Court delivered a