Year	current US$
2000	1458.24848788
2001	1496.62561168
2002	1556.9671336
2003	1866.72103375
2004	2130.66972712
2005	2403.76088289
2006	2630.67850627
2007	2938.06384479
2008	3132.79900971
2009	3066.89799523
2010	3552.80039436
2011	3808.537523
2012	3904.9757234
2013	3888.13619853
2014	3701.35140356
2015	3313.80453707
2016	3259.96415113
2017	3425.59877411
2018	3540.22497126
2019	3556.14666025
2020	4177.37717342
2021	4717.92679139
2022	4426.37974761