Year % of internal resources 2007 25.52536635339183 2008 25.52536635339183 2009 25.52536635339183 2010 25.52536635339183 2011 25.52536635339183 2012 25.52536635339183 2013 25.52536635339183 2014 25.52536635339183 2015 25.52536635339183 2016 25.52536635339183 2017 25.52536635339183 2018 25.52536635339183 2019 25.52536635339183 2020 25.52536635339183