As of 2013[update], CBMM from Brazil controlled 85 percent of the world's niobium production.[45] The United States Geological Survey estimates that the production increased from 38,700 tonnes in 2005 to 44,500 tonnes in 2006.[46][47] Worldwide resources are estimated to be 4,400,000 tonnes.[47] During the ten-year period between 1995 and 2005, the production more than doubled, starting from 17,800 tonnes in 1995.[48] Between 2009 and 2011 production was stable at 63,000 tonnes per year,[49] with a slight decrease in 2012 to only 50,000 tonnes per year.[50]
Reference 1: Australia, Brazil, Canada, Congo D.R., Mozambique, Nigeria, Rwanda and World.
Reference 2: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 and 2011.
Source: http://en.wikipedia.org/wiki/Niobium
Reference 2: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 and 2011.
Source: http://en.wikipedia.org/wiki/Niobium
