Year	current US$
2000	1731.7676339626341
2001	1773.853608056957
2002	1975.2899181194846
2003	2475.4107534352765
2004	2831.398283833302
2005	2948.5069239114623
2006	3116.707478717142
2007	3536.615490652188
2008	3995.238425118778
2009	3929.3198467966363
2010	3814.889146487053
2011	4075.6425243449544
2012	3801.6115866903724
2013	3979.1282081789195
2014	4067.4777890144337
2015	3496.661504850814
2016	3561.5331188260548
2017	3753.0067271409816
2018	4042.9776250234645
2019	3989.30175072551
2020	4261.994081083281
2021	4787.390100445924