Thaksin introduced a range of policies to alleviate rural poverty. Highly popular, they helped reduce poverty by half in four years. He launched the country's first universal healthcare program, the 30-baht scheme, as well as a notorious drug suppression campaign. Thaksin embarked on a massive program of infrastructure investment, including roads, public transit, and Suvarnabhumi Airport. Nevertheless, public sector debt fell from 57 percent of GDP in January 2001 to 41 percent in September 2006. Levels of corruption were perceived to have fallen, with Transparency International's "Corruption Perceptions Index" improving from 3.2 to 3.8 between 2001 and 2005. The Thai Rak Thai party won in a landslide in the 2005 general election, which had the highest voter turnout in Thai history.