Year	constant 2015 US$
1995	58125.56642155298
1996	59127.537159848485
1997	59864.626616974696
1998	61202.881813370564
1999	61636.34040551736
2000	63548.92067735325
2001	63267.19001765417
2002	63543.91266357467
2003	63883.32598493001
2004	65558.98302107478
2005	63862.57002547663
2006	65634.77558814517
2007	66704.16515084785
2008	67396.14110945813
2009	67104.37071572509
2010	66626.67480224869
2011	68427.4897767367
2012	65280.19790540665
2013	66716.02536438055
2014	68040.94936628707
2015	68156.04252715653
2016	69962.09093509095
2017	71639.03719163281
2018	71941.1321387216
2019	73186.02609221221
2020	72075.55615058402
2021	77955.31054234711