Interest as percentage of Tax Revenue

The values in the Interest column are expressed in percentage terms.
Year
 Percentage
2009
7.7
2008
3.8
2007
3.4
2006
3.0
2005
4.4
2004
4.7
2003
5.5
2002
5.7
2001
6.7
2000
7.6
1999
10.0
1998
13.0
1997
17.3
1996
17.7
1995
18.5
1994
19.3
1993
21.4
1992
23.6