2002

7.2

2004

7.1

1985

7.1

2007

6.3

2006

3.0

2007

6.6

2002

6.6

2004

6.4

1981

3.3

1984

5.8

2020

5.3

2003

6.0

2005

6.2

2008

5.2

2008

6.8

1994

5.8

1999

5.6

1965

6.4

1984

6.2

1985

6.0