2014

5.9

1971

6.4

1962

7.6

1967

6.6

2006

7.0

1984

6.5

2009

8.5

2003

5.7

2001

6.8

2011

9.7

1984

6.1

2003

7.4

1997

6.2

1963

7.9

1982

6.9

1997

7.6

2003

6.0

2000

7.2

2001

5.8