Year	constant 2015 US$
2006	6892.063322039804
2007	7413.392226094708
2008	7682.161705714718
2009	7765.464707129197
2010	8007.461502288449
2011	8157.141564285395
2012	8895.99087222201
2013	9105.931736045182
2014	9448.32090179736
2015	9828.206568749543
2016	10036.600531795208
2017	10496.026382765858
2018	11163.36383204666
2019	11485.203763807478
2020	9785.99417655103
2021	10175.232812927301
2022	10510.177253071572
2023	11580.384555361148