Year	current US$
2000	2374.84557799
2001	2441.39334229
2002	2697.33069346
2003	3912.72142806
2004	4610.55827152
2005	4773.68406675
2006	4970.7501862
2007	5635.86792492
2008	6685.78220029
2009	6626.64934509
2010	6526.01934398
2011	6738.12502518
2012	6399.41003728
2013	6863.30054432
2014	7032.86452283
2015	5942.98080658
2016	6229.12858962
2017	6274.73250003
2018	6814.99129679
2019	6661.83371262
2020	6876.15504224
2021	7750.38898134