2002

7.1

2001

6.7

1998

6.6

1994

3.1

2004

7.2

2006

7.0

2003

6.0

2003

6.5

1990

6.6

2006

6.3

2004

6.6

1994

5.8

2003

6.1

1982

5.5

1991

4.6

1989

3.2

2005

5.0

2001

6.5

2003

4.7

1982

4.2