Year 1 in: rate varies by country 2000 1900 2001 2200 2002 1500 2003 1800 2004 2100 2005 2300 2006 2700 2007 3300 2008 3900 2009 3000 2010 3400 2011 4100 2012 4700 2013 5300 2014 5900 2015 4600 2016 6800 2017 6600 2018 6600 2019 9700 2020 5300