A cultural melting pot with Greek, Slavic, Ottoman, and Persian influences, it has a rich heritage of traditional dance, music, costumes, and crafts. Bulgaria is a developing country, with an upper-middle-income economy, ranking 56th in the Human Development Index. Its market economy is part of the European Single Market and is largely based on services, followed by industry especially machine building and mining and agriculture. Widespread corruption is a major socioeconomic issue; Bulgaria ranked as the most corrupt country in the European Union in 2018.
Most of Bulgaria has a moderate continental climate, which is tempered by Mediterranean influences in the south. The average annual temperature is 51 °F, but this conceals a wide variation; temperatures as low as −37 °F and as high as 113 °F have been recorded. Mean annual precipitation ranges from about 18 inches in the northeast to more than 47 inches in the highest mountains.
