2011

6.4

2019

6.6

2007

5.7

2012

6.0

1984

6.5

5.3

2017

5.9

2023

6.2

2017

6.9

2012

5.8

2003

6.2

2002

6.2

1989

7.2

1994

7.7

1997

7.5

1991

4.9

2005

8.3

2024

6.4

1971

6.0

1968

6.4