Year	constant 2015 US$
2000	4542.571561261132
2001	4498.206372968132
2002	4490.752678640985
2003	4586.329740458565
2004	4791.307487875741
2005	5114.173969915386
2006	5455.81878569202
2007	5931.695616193286
2008	6402.165231165328
2009	6716.785989584411
2010	6755.768191162846
2011	6706.76848801326
2012	7324.99335466173
2013	7451.2271639770015
2014	7843.91699245962
2015	8346.803115951358
2016	8403.154576516057
2017	8601.065781194697
2018	8634.05071023925
2019	8985.216235675887
2020	8226.282129693978
2021	9020.555857626785
2022	9342.599309924073
2023	9634.533799128678