Year 1 in: rate varies by country 2000 1200 2001 1200 2002 1800 2003 1800 2004 1700 2005 1800 2006 1900 2007 1900 2008 1900 2009 2000 2010 2100 2011 2200 2012 2300 2013 2300 2014 2400 2015 2400 2016 2500 2017 2500 2018 2500 2019 2500 2020 2500