s of 2015[ [update]] Java's old colonial-era plantations provide just a fraction of the coffee grown on the island; they produce primarily the higher-valued Arabica variety. The Paniis coffee planters cooperation in Sumedang can produce 15 tonnes, 2.5 tonnes of them are produced as kopi luwak. Java's arabica coffee production is centred on the Ijen Plateau, at the eastern end of Java, at an altitude of more than 1,400 meters. The coffee is primarily grown on large estates that were built by the Dutch in the 18th century. The five largest estates are Blawan (also spelled Belawan or Blauan), Jampit (or Djampit), Pancoer (or Pancur), Kayumas and Tugosari, and they cover more than 4,000 hectares.