Year	constant 2015 US$
2002	1561.6739116500707
2003	1670.0484270869806
2004	1772.0071991159543
2005	1838.4396333454106
2006	2082.8970181623736
2007	1832.6580445492143
2008	1525.0947481339233
2009	1784.0360786932695
2010	1916.2551686055938
2011	2213.884612996603
2012	2366.014157977178
2013	2586.7097454003215
2014	2696.2077900758527
2015	2374.5319963952716
2016	2075.9126094380513
2017	1954.168216821148
2018	1946.907494778705
2019	2178.463946731375
2020	1980.885129152929
2021	1904.9533538153603