Year	constant 2015 US$
2000	12785.745064233639
2001	12989.34563004566
2002	11874.40336619674
2003	12967.120677087689
2004	12716.88204782928
2005	13358.685638575813
2006	14115.949122561673
2007	15559.089639487363
2008	16056.00152439029
2009	14006.414482334854
2010	15126.309727279917
2011	14125.427311763306
2012	17047.281059320434
2013	17773.587412933997
2014	17411.768690552457
2015	17185.11563897824
2016	17527.55063172709
2017	17763.677195790595
2018	16975.383271277766
2019	17188.34211447862
2020	15921.184076049896