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• 2011 0.6%

  Consumed (1)

• 2010 0.6%

  Consumed (1)

• 2009 1.2%

  Consumed (2)

• 2008 1.2%

  Consumed (2)

• 2007 21.8%

  Consumed (36)

• 2006 42.4%

  Consumed (70)

• 2005 21.8%

  Consumed (36)

• 2004 4.2%

  Consumed (7)

• 2003 1.8%

  Consumed (3)

• 2002 1.2%

  Consumed (2)

• 2001 1.2%

  Consumed (2)

• 1990 0.6%

  Consumed (1)

• 1982 0.6%

  Consumed (1)

• NV 0.6%

  Consumed (1)