Year	1 in: rate varies by country
2000	2400
2001	2600
2002	2600
2003	2700
2004	3000
2005	3100
2006	3300
2007	3500
2008	3600
2009	3500
2010	3600
2011	3800
2012	4000
2013	4200
2014	4400
2015	4300
2016	4600
2017	4800
2018	4700
2019	5200
2020	4500