The United Arab Emirates (UAE; Arabic: الإمارات العربية المتحدة al-ʾImārāt al-ʿArabīyah al-Muttaḥidah), sometimes simply called the Emirates (Arabic: الإمارات al-ʾImārāt), is a country in Western Asia located at the eastern end of the Arabian Peninsula. It borders Oman and Saudi Arabia, and has maritime borders in the Persian Gulf with Qatar and Iran. It is a federal elective constitutional monarchy formed from a federation of seven emirates, consisting of Abu Dhabi (which serves as the capital), Ajman, Dubai, Fujairah, Ras Al Khaimah, Sharjah and Umm Al Quwain. Their boundaries have numerous enclaves within each other. Each emirate is governed by a ruler, who together form the Federal Supreme Council, and one of whom serves as President of the United Arab Emirates. In 2013, the UAE's population was 9.2 million, of which 1.4 million were Emirati citizens and 7.8 million were expatriates. The estimated population of the UAE in 2020 was 9.89 million.Islam is the official religion and Arabic is the official language. The UAE's oil reserves are the sixth-largest in the world while its natural gas reserves are the world's seventh-largest. Zayed bin Sultan Al Nahyan, ruler of Abu Dhabi and the first President of the UAE, oversaw the development of the Emirates and steered oil revenues into healthcare, education, and infrastructure. The UAE's economy is the most diversified in the Gulf Cooperation Council, while its most populous city of Dubai is a global city and international aviation and maritime trade hub. The country has become less reliant on oil and gas, and is economically focusing on tourism and business. The UAE government does not levy income tax, although there is a system of corporate tax in place and value-added tax at 5% was established in 2018.The sovereign state of the UAE rising international profile has led to it being recognised as a regional and a middle power. The UAE is a member of the United Nations, the Arab League, the Organisation of Islamic Cooperation, OPEC, the Non-Aligned Movement, and the Gulf Cooperation Council.