Year	constant 2011 international $
1990	2875.30959303622
1991	3044.71996262113
1992	3262.83391982108
1993	3503.63615096116
1994	3778.77048743486
1995	3956.41126550767
1996	4273.94884139757
1997	4555.02112791599
1998	4503.44414076481
1999	4662.13626897176
2000	4616.77651543494
2001	4731.57875396328
2002	4787.84906007323
2003	4755.31884613111
2004	4825.81426622256
2005	4728.96327106503
2006	4970.34159685917
2007	5318.30822487211
2008	5420.94151994927
2009	5606.73767370442
2010	5825.38458368878
2011	6106.96737115033
2012	6400.49913479322
2013	6686.16460900106
2014	6906.12991476498
2015	7086.91276734193
2016	7284.58199488894
2017	7399.13609612809
2018	7616.69405964665