Year	current US$
1995	3651855091.1477056
1996	3840056796.992481
1997	3995738721.064872
1998	4602822826.927929
1999	4970999829.95854
2000	5118028073.165768
2001	4664681127.764445
2002	5480108005.8519535
2003	6859594532.584182
2004	8270948217.524295
2005	10122557838.2292
2006	10237828783.129095
2007	13491144313.4806
2008	11073602360.03361
2009	8556001218.068172
2010	8496491517.5939045
2011	9298135970.168144
2012	9127487348.633537
2013	10125094211.107744
2014	11369900896.927153
2015	11278073577.966501
2016	13588736633.96387
2017	16172472712.391485
2018	17156551682.236927
2019	16281420800.465069
2020	14098861526.929947
2021	16691349080.428534
2022	18418764170.708683
2023	20050366106.26547