Bhumibol is credited with a social-economic theory of self-sufficiency. Forbes estimated Bhumibol's personal fortune, including property managed by the Crown Property Bureau which is considered national property,[8] to be US$30 billion in 2010, and he has been consistently placed at number one of the magazine's list of "The World's Richest Royals".[9][10] This estimation includes land ownership which the royal family says it does not own. The Crown Property Bureau spends money on public welfare such as youth development, however it does not pay taxes and its finances are reported only to Bhumibol.[11] Bhumibol himself has made donations to numerous development projects in Thailand, in areas including agriculture, environment, public health, occupational promotion, water resources, communications and public welfare.[12] Commemorations of Bhumibol's contributions to Thailand are ubiquitous in the Thai media.[13]