active in exile. Tibetan activists in Tibet have reportedly been arrested or tortured. With the growth of tourism in recent years, the service sector has become the largest sector in Tibet, accounting for 50.1% of the local GDP in 2020. The dominant religion in Tibet is Tibetan Buddhism; other religions include Bön, an indigenous religion similar to Tibetan Buddhism, Tibetan Muslims, and Christian minorities. Tibetan Buddhism is a primary influence on the art, music, and festivals of the region. Tibetan architecture reflects Chinese and Indian influences. Staple foods in Tibet are roasted barley, yak meat, and butter tea. Names The Tibetan name for their land, Bod (), means 'Tibet' or 'Tibetan Plateau', although it originally meant the central region around Lhasa, now known in Tibetan as Ü (). The Standard Tibetan pronunciation of Bod () is transcribed as: Bhö in Tournadre Phonetic Transcription; Bö in the THL Simplified Phonetic Transcription; and Poi in Tibetan pinyin. Some scholars believe the first written reference to Bod ('Tibet') was the ancient Bautai people recorded in the Egyptian-Greek works Periplus of the Erythraean Sea (1st century CE) and Geographia (Ptolemy, 2nd century CE), itself from the Sanskrit form Bhauṭṭa of the Indian geographical tradition. The modern Standard Chinese exonym for the ethnic Tibetan region is Zangqu (), which derives by metonymy from the Tsang region around Shigatse plus the addition of a Chinese suffix (), which means 'area, district, region, ward'. Tibetan people, language, and culture, regardless of where they are from, are referred to as Zang (), although the geographical term is often limited to the Tibet Autonomous Region. The term Xīzàng was coined during the Qing dynasty in the reign of the Jiaqing Emperor (1796–1820) through the addition of the prefix (, 'west') to Zang. The best-known medieval Chinese name for Tibet is Tubo (; or , or , ). This name first appears in Chinese characters as in the 7th century (Li Tai) and as in the 10th-century (Old Book of Tang, describing 608–609 emissaries from Tibetan King Namri Songtsen to Emperor Yang of Sui). In the Middle-Chinese language spoken during that period, as reconstructed by William H. Baxter, was pronounced thu-phjon, and was pronounced thu-pjon (with the representing a shang tone). Other pre-modern Chinese names for Tibet include: Wusiguo (; cf. Tibetan: dbus, Ü, ); Wusizang (, cf. Tibetan: dbus-gtsang, Ü-Tsang); Tubote (); and Tanggute (, cf. Tangut). American Tibetologist