Year 1 in: rate varies by country 2000 23 2001 25 2002 26 2003 28 2004 30 2005 31 2006 32 2007 31 2008 29 2009 33 2010 37 2011 39 2012 48 2013 47 2014 50 2015 53 2016 62 2017 66 2018 69 2019 71 2020 83