2001

6.8

2004

6.4

2004

7.7

1994

5.9

2001

6.5

2005

5.9

2003

3.1

1990

6.0

2003

6.3

2002

5.6

1997

6.5

1997

5.1

2002

6.3

2008

6.7

2003

5.6

1999

4.3

2005

5.6

1987

7.3

2007

6.5

1986

4.4