2005

7.0

1990

7.0

2001

8.5

1987

7.8

2018

7.6

2004

8.3

2008

8.9

2016

10.0

1998

7.5

2013

8.2

2016

8.6

1979

6.9

2009

6.8

5.8

1991

7.4

2010

8.2

1989

8.4

2006

8.6

2012

8.2

1998

7.1