2004

3.7

2004

4.9

2006

6.8

2008

5.6

1969

8.1

2009

5.7

1998

7.0

2002

6.7

1994

8.7

2012

5.0

1993

7.5

2008

6.8

1968

6.0

2010

7.1

1958

8.2

1971

8.2

2008

6.3

2023

8.1

1969

7.1

1990

6.1