2007

7.7

2000

6.0

2004

8.0

1985

7.1

1971

7.5

1996

5.8

2011

5.3

2011

6.2

1983

4.5

1994

7.1

1970

7.3

1989

6.4

2004

6.4

2001

5.8

1987

6.5

1992

5.0

2012

8.0

2009

7.3

1999

7.2

2009

6.7