1995

7.8

2001

7.6

1965

7.2

2004

8.3

2000

8.0

2006

7.4

1999

7.4

1995

8.1

2009

7.4

1989

8.3

1990

8.2

2016

7.0

1989

8.0

1973

6.8

2008

8.3

1994

6.7

2001

7.3

1976

7.8

2014

6.6

2008

8.3