Year % of internal resources 2008 34.16190476190476 2009 34.16190476190476 2010 34.16190476190476 2011 34.16190476190476 2012 34.16190476190476 2013 34.16190476190476 2014 34.16190476190476 2015 34.16190476190476 2016 34.16190476190476 2017 34.16190476190476 2018 34.16190476190476 2019 34.16190476190476 2020 34.16190476190476