단위: 10억 달러
1988 3.372
1989 5.55
1990 11.093
1991 21.712
1992 19.443
1993 21.199
1994 51.62
1995 73.597
1996 105.049
1997 139.89
1998 144.959
1999 154.675
2000 165.574
2001 212.165
2002 286.407
2003 403.251
2004 609.932
2005 818.872?