Year	constant 2015 US$
1993	4456.213821227799
1994	4482.619633547592
1995	4710.655537054529
1996	5067.484482786209
1997	5247.869748942983
1998	5500.786598161472
1999	5459.32766271657
2000	5604.79123839742
2001	5912.636636172344
2002	6249.545578270502
2003	6309.486379884116
2004	6769.514377363258
2005	7074.387710316039
2006	7520.940395597612
2007	8110.300628165322
2008	8671.9195190946
2009	8645.345546388122
2010	8709.115449294068
2011	8531.069982962288
2012	8550.429789022366
2013	8440.424965449043
2014	8590.790572747292
2015	8820.036506119692
2016	9152.415820181082
2017	9560.532616548044
2018	9936.652397819229
2019	10191.260945301756
2020	10068.038830349116
2021	10346.86086119977
2022	11011.23838508332
2023	10617.768433338471