Year	constant 2015 US$
2007	1864.3018482811801
2008	1855.6760555896565
2009	2294.8241110234294
2010	2291.8162838906255
2011	2218.7051380597118
2012	2656.2743548820654
2013	2596.131220308382
2014	2598.687061879674
2015	2459.3120695114694
2016	2466.218571789753
2017	2450.3094468436343
2018	2445.811358745142
2019	2425.9144581531714
2020	2239.060156097363
2021	2245.012374032064