Year	current US$
2000	1470.6739620474334
2001	1521.3310274188855
2002	1644.3933372424444
2003	1886.4005276412615
2004	2100.7098076269244
2005	2216.7524109584742
2006	2337.8596052036123
2007	2553.408104385359
2008	2779.537911481254
2009	2848.988036395215
2010	2952.8390277926333
2011	3216.259710415341
2012	3202.2956109130896
2013	3206.6303837520013
2014	3323.2956880810734
2015	3183.9315751949466
2016	3287.8280100224106
2017	3394.8541329529357
2018	3577.171456327269
2019	3652.2269048602207
2020	4191.961715461409
2021	4460.07935961373