1997

7.1

2005

6.5

2007

6.8

2004

7.3

1989

7.5

2004

7.1

2005

6.2

2018

6.4

1963

7.0

1970

6.8

1984

6.8

1992

7.4

2011

5.9

2024

6.7

2020

0.0

1987

5.7

1969

7.0

1997

6.1

2007

5.4

2001

6.9