Year	constant 2010 US$
1980	1401.91344235523
1981	1411.27276879169
1982	1458.46885354648
1983	1487.16723026898
1984	1506.300212497
1985	1497.84533193777
1986	1482.33826339852
1987	1463.03977177595
1988	1458.56395916615
1989	1370.94318857705
1990	1398.86943497258
1991	1285.05777137657
1992	1354.49874010408
1993	1355.38479108678
1994	1247.75134665256
1995	1257.12706436576
1996	1207.28313117228
1997	1222.59546164709
1998	1206.00342016798
1999	1197.9195381605
2000	1294.79391851645
2001	1292.74811619828
2002	1291.23419328979
2003	1287.35770139402
2004	1281.27616375227
2005	1286.61310619557
2006	1289.47109381123
2007	1269.00552890628
2008	1288.42134553411
2009	1298.0073467865
2010	1315.21480648394
2011	1336.43361143132
2012	1346.23735348604
2013	1373.36033013866
2014	1369.17663091131
2015	1352.12677184471
2016	1350.16139637093
2017	1355.5393964334
2018	1362.63852837526