Year	constant 2015 US$
1980	1143.052986293329
1981	1153.3058068049688
1982	1194.8741232706811
1983	1220.5323183892003
1984	1237.5926179941239
1985	1232.164889498378
1986	1221.3013653650437
1987	1207.468576801609
1988	1205.9400242928475
1989	1135.5427816250483
1990	1161.4282908210519
1991	1071.0421182631487
1992	1134.9214075263756
1993	1142.9769936372827
1994	1059.433641376655
1995	1074.3500904728926
1996	1037.885690890705
1997	1056.744094696467
1998	1047.6338664926961
1999	1046.5267948788198
2000	1137.7618375832624
2001	1140.958998825557
2002	1143.8730018999663
2003	1145.23716566937
2004	1145.079958285184
2005	1154.6641042418444
2006	1161.7540247956752
2007	1139.3593423799339
2008	1167.6174844772631
2009	1193.687642151038
2010	1191.779935289572
2011	1220.9417578966757
2012	1246.0929273231775
2013	1261.1108442904776
2014	1252.4503019762742
2015	1234.334547407331
2016	1246.7865973409773
2017	1272.8069184184676
2018	1278.9071708734552
2019	1302.606098804009
2020	1328.0570114969332
2021	1314.9205293429955
2022	1293.7548071011577
2023	1298.8888401159536