Year current international $ 2000 23 2001 5 2002 6 2003 5 2004 2 2005 1 2006 3 2007 3 2008 3 2009 7 2010 12 2011 23 2012 18 2013 10 2014 5 2015 18 2016 2 2017 5 2018 6 2019 22 2020 21 2021 11