Year	current international $
1990	19010
1991	19710
1992	19150
1993	18760
1994	20440
1995	21850
1996	22830
1997	23530
1998	25660
1999	26390
2000	28920
2001	29760
2002	29810
2003	28980
2004	31250
2005	34620
2006	34610
2007	40270