Year	constant 2015 US$
1991	68668.82862144252
1992	70193.74831765171
1993	70684.73583167337
1994	71820.24501505766
1995	68018.46958097625
1996	68469.72993174056
1997	69613.11250894426
1998	70808.10763592002
1999	70873.88423586456
2000	71734.84987735619
2001	72243.1299967952
2002	71919.48264938795
2003	70938.98455416788
2004	71446.81895616977
2005	71102.53363050747
2006	71695.79212855862
2007	72278.13367130069
2008	71707.85284352569
2009	70290.98239986076
2010	70849.51815337589
2011	71973.32546957905
2012	71880.85166600872
2013	71708.61796173667
2014	71856.35020260155
2015	72001.42468017322
2016	71722.18572364237
2017	72364.62647493785
2018	72589.4579826229
2019	72983.20655826658
2020	69804.64579326264
2021	72503.36535998434
2022	73458.3441064457