Turkey has a population of approximately 78 million people, most of whom live in cities. The government is a republican parliamentary democracy that has experienced occasional interruptions from the military. Agriculture is a leading industry, with wheat, sugar beets, grapes, and other crops comprising most of the land use. The climate varies from mild on the coasts to colder and drier inland, influenced by proximity to the Mediterranean, Black Sea, and mountain ranges. Turkish culture is over 98% Muslim, and Turkish is the primary language though Arabic and Kurdish are also spoken in some regions.