2008

8.9

1995

8.2

1975

8.3

2004

7.2

1982

7.6

2011

7.6

1969

7.4

1983

6.8

1999

7.4

2006

7.8

2010

7.7

2019

8.7

2016

7.2

2005

7.6

1989

8.2

2000

7.6

2003

8.2

1999

7.9

2016

7.0

1998

7.0