1982

7.6

2009

7.5

2010

8.0

1994

6.8

1983

8.0

2014

8.0

1999

8.2

1989

6.7

1965

7.9

2011

7.3

2005

7.2

2004

7.9

1996

7.0

2010

8.1

2006

6.3

2018

7.7

2010

8.0

1994

8.4

1997

7.2

2014

7.2