2008

6.6

2000

5.3

2014

3.6

2007

6.0

2017

5.8

2004

6.2

1999

6.7

2014

3.0

1963

4.8

1994

6.7

1979

5.2

2005

4.0

2002

6.7

2012

7.4

2010

7.0

2022

0.0

1972

10.0

1972

5.0

1977

5.0

2016

6.8