2007

7.7

1984

6.3

2007

7.4

2004

8.0

2010

6.4

1992

6.9

2007

7.2

2012

7.8

2014

5.6

2003

6.2

2012

6.2

1993

5.5

1966

6.1

2005

7.8

2004

7.8

2009

6.1

2002

6.6

1992

6.0

1998

7.1

2010

7.7