Year 1 in: rate varies by country 2000 10 2001 10 2002 11 2003 12 2004 13 2005 13 2006 14 2007 16 2008 19 2009 20 2010 22 2011 26 2012 29 2013 30 2014 33 2015 35 2016 43 2017 42 2018 47 2019 53 2020 52