Year	current US$
1988	160.47684253132243
1989	239.03067798885232
1990	262.6584565228638
1991	390.70967610875863
1992	404.9537718435154
1993	422.5132967585246
1994	834.876026396593
1995	875.0470132021351
1996	895.2091657788012
1997	896.650258103592
1998	931.813524576283
1999	961.6085178490106
2000	997.3379696172667
2001	1030.6204640957742
2002	993.293498076813
2003	999.8462354899359
2004	1075.5124550533117
2005	1158.8833680415846
2006	1223.1318764283194
2007	1323.8491626099772
2008	1493.904544267729
2009	1438.0868234093875
2010	1495.729189902715
2011	1644.7993541223648
2012	1746.4185842898755
2013	1794.7799647152683
2014	1913.521348316633
2015	2025.3247759757523
2016	2079.453734955173
2017	2127.285720225757
2018	1981.8591203743294
2019	1905.6409173644556
2020	1877.1085553706152
2021	2064.6646185054974
2022	2252.31020571776
2023	2530.291072036237