1992

8.4

2007

8.0

1999

7.8

2009

7.8

1989

7.5

1991

7.6

1992

7.8

2024

8.6

2004

8.5

1996

8.0

1996

6.9

2005

6.8

1995

8.0

1981

8.1

1987

7.7

1990

7.8

2015

8.8

2016

7.4

2014

8.0

2014

8.5