Year	Purchasing power parity; 2011 international dollar (Units)
1980	4816.29
1981	5049.77
1982	5013.08
1983	4929.22
1984	4460.39
1985	4627.39
1986	4266.04
1987	4177.67
1988	4555.45
1989	4140.33
1990	4417.17
1991	4748.64
1992	5225.27
1993	5458.37
1994	5608.45
1995	5762.96
1996	5790.05
1997	5592.32
1998	5764.56
1999	5449.64
2000	5432.83
2001	5483.35
2002	5647.68
2003	5374.35
2004	5571.58
2005	5729.16
2006	5872.46
2007	6055.37
2008	6173.18
2009	6379.78
2010	6506.50