2001

7.4

1998

8.2

2000

8.0

2004

7.9

1998

2.5

1997

0.0

2005

8.1

2001

6.5

1998

5.4

2000

8.5

1996

5.5

1998

4.9

2009

5.1

1993

6.1

1999

7.0

2010

5.7

1988

7.0

2002

4.7

2008

4.5

2003

6.3

2001

5.9

1996

6.9

2003

7.4

2005

7.5

2011

5.2