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Historical Values
Year Value
1999 21% (1992 est.)
2000 21% (1992 est.)
2001 21% (1992 est.)
2002 21% (1992 est.)
2003 21% (1992 est.)
2004 21% (1992 est.)
2005 21% (1992 est.)
2006 21% (1992 est.)
2007 21% (1992 est.)
2009 17% (2007 est.)
2010 17% (2007 est.)
2011 17% (2007 est.)
2012 17% (2007 est.)
2013 17% (2007 est.)
2014 17% (2007 est.)
2015 17% (2007 est.)
2016 17% (2007 est.)
2017 20% (2014 est.)
2018 20% (2014 est.)
2019 20% (2014 est.)
2020 20% (2014 est.)
2021 20% (2014 est.)
2022 20% (2014 est.)
2023 20% (2014 est.)
2024 20% (2014 est.)