Year	constant 2015 US$
1995	24359.121369302382
1996	24789.885005131535
1997	26900.023104194715
1998	27122.414507675356
1999	27753.516354242154
2000	27100.658684859023
2001	27737.920655147194
2002	28547.926637023054
2003	28262.6770694653
2004	28445.261417416492
2005	29267.779820492782
2006	29855.674429798346
2007	32462.668066202605
2008	33629.91075138898
2009	32809.36665919554
2010	34740.79735054643
2011	35015.44806912853
2012	35737.760731214235
2013	35540.927967947064
2014	33190.99146485539
2015	34572.66320347683
2016	34836.4872024301
2017	35667.99369115216
2018	35256.819346263204
2019	35848.22563660587
2020	37019.079260615625
2021	38062.31627358857
2022	38652.06121402593