Year	constant 2015 US$
1991	8320.710222162343
1992	10605.187636998218
1993	10307.21060526913
1994	6847.196424756599
1995	7571.382767590725
1996	7560.580929336035
1997	7495.920474370658
1998	6495.3995389712145
1999	5529.660376291953
2000	5693.285919176768
2001	5263.198201959816
2002	7279.545961225198
2003	6123.35815532649
2004	5463.102683625145
2005	4749.137795535362
2006	4840.304410862933
2007	4881.439967706265
2008	5931.169660754287
2009	5949.466876521005
2010	3737.831056296451
2011	3725.60470145598
2012	4461.265694109348
2013	4928.65301172809
2014	4438.018892898696
2015	4593.991866719139
2016	4675.189168670283
2017	4493.669748349265
2018	4657.897312051951
2019	5302.767252129156
2020	6700.16688704385
2021	5038.87553281552
2022	4916.315696575657