Quarter	Millions of US Dollars
1991-04-01	81
1991-07-01	88
1991-10-01	94
1992-01-01	87
1992-04-01	95
1992-07-01	89
1992-10-01	76
1993-01-01	75
1993-04-01	75
1993-07-01	75
1993-10-01	74
1994-01-01	74
1994-04-01	77
1994-07-01	79
1994-10-01	78
1995-01-01	81
1995-04-01	80
1995-07-01	79
1995-10-01	78
1996-01-01	76
1996-04-01	77
1996-07-01	78
1996-10-01	85
1997-01-01	81
1997-04-01	83
1997-07-01	81
1997-10-01	83
1998-01-01	84
1998-04-01	83
1998-07-01	85
1998-10-01	83
1999-01-01	81
1999-04-01	79
1999-07-01	82
1999-10-01	81
2000-01-01	80
2000-04-01	76
2000-07-01	73
2000-10-01	75
2001-01-01	71
2001-04-01	70
2001-07-01	73
2001-10-01	72
2002-01-01	71
2002-04-01	77
2002-07-01	78
2002-10-01	81
2003-01-01	79
2003-04-01	82
2003-07-01	83
2003-10-01	90
2004-01-01	92
2004-04-01	91
2004-07-01	90
2004-10-01	97
2005-01-01	94