2007

7.2

1958

6.0

2014

4.8

2004

7.2

1987

6.5

2004

5.9

2004

6.9

2000

7.2

2001

6.4

1984

6.7

2011

6.6

1992

7.5

2006

6.8

1999

6.7

1995

5.8

1982

7.5

1979

5.6

1985

0.0

1970

7.1

2005

6.1