Year	current US$
1993	3.584794379647606
1994	16.019559665310037
1995	26.403708839325997
1996	41.3350294515828
1997	48.65163314120857
1998	20.064299786455084
1999	15.657738093215485
2000	30.574305905597747
2001	63.03022878758371
2002	26.452346327973608