Year	constant 2015 US$
1995	31346.174953875056
1996	32208.9188494287
1997	34523.197955424155
1998	36553.31648965269
1999	38133.52172251867
2000	39791.092617342125
2001	41016.74099100383
2002	41473.3191475855
2003	41348.04817236906
2004	43079.734989444325
2005	43526.85032915018
2006	44790.017340795726
2007	46555.98783512426
2008	46146.531638785214
2009	42749.381500341486
2010	43706.31905014533
2011	43895.6549632792
2012	42950.186203831974
2013	42506.13479910565
2014	42643.472439028985
2015	43222.8706588894
2016	44051.12455952438
2017	45085.01121265467
2018	45818.50902488215
2019	46281.75359694685
2020	45894.03715151559
2021	47040.92494441133
2022	46816.173858751186
2023	45739.06324280684