Year	constant 2015 US$
1991	342.2980671244984
1992	346.52281853707314
1993	351.0210722307836
1994	355.96322833638936
1995	357.23878505679073
1996	363.2720763547713
1997	382.115060268889
1998	396.8364690140442
1999	415.54526802692044
2000	423.4807113081912
2001	448.8556641296774
2002	464.0159855897918
2003	482.1528408094742
2004	493.62713006988037
2005	498.4361634940423
2006	508.6198348146755
2007	514.0013274301386
2008	529.6222660548591
2009	488.83935779980305
2010	577.8721676657611
2011	611.2211173037332
2012	632.3741713033119
2013	670.3338581358131
2014	687.3300572325754
2015	737.3283193429515
2016	766.2380694813065
2017	898.9728181761145
2018	944.631918370103
2019	1089.7076785384193
2020	1076.4182417600373
2021	1137.61861942196
2022	1155.2591765008315