Year	1 in: rate varies by country
2000	3800
2001	4000
2002	3900
2003	4100
2004	4400
2005	4600
2006	4800
2007	4900
2008	5000
2009	4800
2010	5200
2011	5300
2012	5400
2013	5500
2014	5600
2015	5500
2016	5500
2017	5600
2018	5600
2019	5800
2020	5400