Year	constant 2015 US$
1997	110362968.98126596
1998	106514631.50978097
1999	103307510.76340696
2000	109005253.31497197
2001	115679715.87181097
2002	119207156.59856798
2003	121902016.63970898
2004	123362051.33795696
2005	126047140.50888999
2006	120348640.02466199
2007	126233868.18170501
2008	116967854.142189
2009	122447037.45842001
2010	125530715.58475502
2011	124509591.46022801
2012	127917229.86102101
2013	131061945.080757
2014	131669919.10338399
2015	138689125.180244
2016	140719300.061464
2017	147663111.180067
2018	152143972.78428102
2019	151973786.264658
2020	151382335.007191
2021	149492537.14084598
2022	152450188.51757002