1990

6.9

2008

7.6

2024

7.5

2004

7.3

2017

4.5

2011

5.9

1993

6.6

1975

6.3

2004

7.3

2003

8.2

2008

8.1

1994

7.2

2007

7.7

2005

7.5

2007

7.0

2009

5.9

2001

7.6

2008

7.3

1995

6.5

2011

7.3