1994

8.5

1995

8.4

2009

7.6

2023

8.1

2007

8.1

2023

7.0

1984

7.7

1982

8.1

2011

7.5

1999

8.0

1991

8.3

1994

8.7

2012

8.2

2001

7.9

2012

7.4

2000

7.4

2014

6.5

1979

8.2

1994

8.5

2004

6.4