tanzania 2003 31 1 a reference that includes section mark is found in the internet cited mineral industry of by thomas r yager recent years has produced copper gold silver rolled steel products and such industrial minerals as calcite diamond other gemstones gypsum phosphate rock salt silica sand soda ash country also coal petroleum building materials cement gravel limestone deposits cobalt iron ore natural gas nickel titanium are known to occur s gross domestic product gdp based on purchasing power parity amounted 21 6 billion per capita was about 600 grew 7 compared with 2 2002 2001 manufacturing accounted for 9 construction 5 mining quarrying 3 electricity water international monetary fund 2004a p 43 b 206 2004 value output sector 17 after rising 15 from 1999
