2004

8.6

1998

8.5

1998

7.2

2001

8.5

1993

6.6

2009

6.1

1992

5.8

2017

7.9

2018

9.0

2009

6.8

2020

9.0

2012

6.1

1963

7.8

1991

7.4

2013

7.6

1990

7.1

1989

7.0

1999

7.4

1989

8.5

2024

6.0