Year	constant 2015 US$
1999	9370.58118095809
2000	9535.722055286751
2002	10672.767190306866
2003	8933.164472593966
2004	9249.619031529919
2005	9568.54861380755
2006	9471.106412653058
2007	9263.636543958877
2008	9461.356297812965
2009	9338.055352268042
2010	9473.481097203092
2011	8906.427004706358
2012	8969.175179483595
2013	9291.982991433028
2014	10217.375835958599
2015	10240.748100954877
2016	10373.208301083234
2017	10413.47798659566
2018	10432.384436384746
2019	10358.277799121035
2020	9312.679390548828
2021	8897.381067036786
2022	9293.13195775788