of January 1, 2008 estimates by the San Diego Association of Governments revealed that the household median income for San Diego rose to $66,715, up from $45,733 in 2000. San Diego was named the ninth-most LGBT-friendly city in the U.S. in 2013. The city also has the seventh-highest population of gay residents in the U.S. Additionally in 2013, San Diego State University (SDSU), one of the city's prominent universities, was named one of the top LGBT-friendly campuses in the nation. According to a 2014 study by the Pew Research Center, 68% of the population of the city identified themselves as Christians, with 32% professing attendance at a variety of churches that could be considered Protestant, and 32% professing Roman Catholic beliefs. while 27% claim no religious affiliation. The same study says that other religions (including Judaism, Buddhism, Islam, and Hinduism) collectively make up about 5% of the population. Economy The largest sectors of San Diego's economy are defense/military, tourism, international trade, and research/manufacturing. In 2014, San Diego was designated by a Forbes columnist as the best city in the country to launch a small business or startup company. San Diego recorded a median household income of $79,646 in 2018, an increase of 3.89% from $76,662 in 2017. The median property value in San Diego in 2018 was $654,700, and the average home has two cars per household. Defense and military The economy of San Diego is influenced by its deepwater port, which includes the only major submarine and shipbuilding yards on the West Coast. Several major national defense contractors were started and are headquartered in San Diego, including General Atomics, Cubic, and NASSCO. San Diego hosts the largest naval fleet in the world: In 2008 it was home to 53 ships, over 120 tenant commands, and more than 35,000 sailors, marines, Department of Defense civilian employees and contractors. About 5 percent of all civilian jobs in the county are military-related, and 15,000 businesses in San Diego County rely on Department of Defense contracts. Military bases in San Diego include US Navy facilities, Marine Corps bases, and Coast Guard stations. The city is "home to the majority of the U.S. Pacific Fleet's surface combatants, all of the Navy's West Coast amphibious ships and a variety of Coast Guard and Military Sealift Command vessels". The military infrastructure in San Diego is still growing and developing, with numerous military personnel stationed there, numbers