Cambodia officially known as the Kingdom of Cambodia, is a sovereign state located in the southern portion of the Indochina Peninsula in Southeast Asia. It is 181,035 square kilometres (69,898 square miles) in area, bordered by Thailand to the northwest, Laos to the northeast, Vietnam to the east, and the Gulf of Thailand to the southwest. Cambodia has a population of over 15 million. The official religion is Theravada Buddhism, practised by approximately 95 percent of the population. The country's minority groups include Vietnamese, Chinese, Chams, and 30 hill tribes. The capital and largest city is Phnom Penh, the political, economic, and cultural centre of Cambodia. The kingdom is an elective constitutional monarchy with Norodom Sihamoni, a monarch chosen by the Royal Throne Council, as head of state. The head of government is Hun Sen, who is currently Prime minister and the longest serving non-royal leader in Southeast Asia and has ruled Cambodia for over 30 years. In 802 AD, Jayavarman II declared himself king, uniting the warring Khmer princes of Chenla under the name "Kambuja". This marked the beginning of the Khmer Empire which flourished for over 600 years, allowing successive kings to control and exert influence over much of Southeast Asia and accumulate immense power and wealth. The Indianized kingdom built monumental temples including Angkor Wat, now a World Heritage Site, and facilitated the spread of first Hinduism, then Buddhism to much of Southeast Asia. After the fall of Angkor to Ayutthaya in the 15th century, a reduced and weakened Cambodia was then ruled as a vassal state by its neighbours. In 1863 Cambodia became a protectorate of France which doubled the size of the country by reclaiming the north and west from Thailand. Tourist destinations include Sihanoukville in the south west which has several popular beaches and the sleepy riverside town of Battambang in the north west, both of which are a popular stop for backpackers who make up a large of portion of visitors to Cambodia. The area around Kampot and Kep including the Bokor Hill Station are also of interest to visitors. Tourism has increased steadily each year in the relatively stable period since the 1993 UNTAC elections; in 1993 there were 118,183 international tourists, and in 2009 there were 2,161,577 international tourists. Most of the tourists were Japanese, Chinese, Filipinos, Americans, South Koreans and French, said the report, adding that the industry earned some 1.4 billion US dollars in 2007, accounting for almost ten percent of the kingdom's gross national product. Chinese-language newspaper Jianhua Daily quoted industry officials as saying that Cambodia will have three million foreign tourist arrivals in 2010 and five million in 2015. Tourism has been one of Cambodia's triple pillar industries. The Angkor Wat historical park in Siem Reap province, the beaches in Sihanoukville and the capital city Phnom Penh are the main attractions for foreign tourists. Cambodia's reputation as a safe destination for tourism however has been hindered by civil and political unrest and multiple high-profile examples of serious crime perpetrated against tourists visiting the Kingdom. Cambodia's tourist souvenir industry employs a lot of people around the main places of interest. Obviously, the quantity of souvenirs that are produced is not sufficient to face the increasing number of tourists and a majority of products sold to the tourists on the markets are imported from China, Thailand and Vietnam. Some of the locally produced souvenirs include.