2004

4.6

2009

5.7

2024

6.0

1999

7.0

2007

7.3

2006

3.5

1993

7.3

2008

6.9

1960

5.4

1970

5.0

2008

6.2

2007

5.3

2006

5.6

2019

2.0

2001

4.4

2008

6.5

1967

7.8

2007

6.7

2009

5.9

1986

7.7