This zone includes the southern tip of Uruguay and South Africa; the southern half of Chile and Argentina; parts of Australia, going south from Adelaide, and all of New Zealand. The Sagittarius constellation that includes the galactic centre is a southern constellation as well as both Magellanic Clouds. This, combined with clearer skies, makes for excellent viewing of the night sky from the Southern Hemisphere with brighter and more numerous stars. Forests in the Southern Hemisphere have special features which set them apart from those in the Northern Hemisphere. Both Chile and Australia share, for example, unique beech species or "Nothofagus", and New Zealand has members of the closely related genera "Lophozonia" and "Fuscospora". The eucalyptus is native to Australia but is now also planted in Southern Africa and Latin America for pulp production, and increasingly, biofuel uses. Around 800 million humans live in the Southern Hemisphere, representing only 10–12% of the total global human population of 7.3 billion. Of those 800 million people, more than 200 million live in Brazil, the largest country by land area in the Southern Hemisphere, while 145 million live on the island of Java, the most populous island in the world. The most populous nation in the Southern Hemisphere is Indonesia, with 267 million people (roughly 30 million of whom live north of the Equator on the northern portions of the islands of Sumatra, Borneo, and Sulawesi, while the rest of the population lives in the Southern Hemisphere). Portuguese is the most spoken language in the Southern Hemisphere, followed by Spanish and Javanese. The largest metropolitan areas in the Southern Hemisphere are Jakarta (32 million people), São Paulo (22 million people), Buenos Aires (16 million people), Rio de Janeiro (12 million people), Kinshasa (11 million people), Lima (10 million), Johannesburg (10 million), Santiago (7 million) and Sydney (5 million). The most important financial and commercial centers in the Southern Hemisphere are São Paulo, where the Bovespa Index is headquartered, along with Sydney, home to the Australian Securities Exchange, Johannesburg, home to the Johannesburg Stock Exchange, and Buenos Aires, headquarters of the Buenos Aires Stock Exchange, the oldest stock market in the Southern Hemisphere. Among the most developed nations in the Southern Hemisphere is Australia, with a nominal GDP "per capita" of US$53,825 and a human development index (HDI) of 0.938, the sixth-highest in the world as of the 2019 report.