2005

6.2

2005

6.8

1999

7.2

2006

7.1

2007

7.3

2006

6.8

1985

7.1

1990

5.8

2006

6.7

1984

4.8

1995

7.9

2000

7.1

1996

6.6

2003

7.8

2002

7.1

1990

7.8

1996

8.0

2017

7.4

1996

7.3

1966

8.2