1998

6.2

2003

5.9

2017

5.6

2009

6.8

2007

3.8

2019

6.4

1963

7.1

1967

6.6

1974

6.4

1981

6.5

2006

6.6

2005

5.6

2007

6.1

1995

6.0

2004

7.2

2024

6.9

2019

3.3

2014

5.5

1983

6.0

2005

6.7