Year	constant 2015 US$
2008	20084315684.372803
2009	20841601288.682407
2010	21803134605.30491
2011	20880575476.596508
2012	22888244095.8655
2013	23854635432.053394
2014	26292670783.64703
2015	29902994240.144417
2016	31820202684.317226
2017	33720451717.10861
2018	35733473213.8073
2019	37347318025.12911
2020	37876464461.24359
2021	39891683627.12344
2022	41648153090.262
2023	43314898792.041