2015

6.0

2001

7.9

2002

7.7

2004

8.0

2005

7.8

2007

7.7

2009

7.7

1972

7.1

2006

6.7

1985

7.2

1957

8.1

1986

4.9

2014

5.7

1998

6.8

2001

7.8

2004

7.3

1992

7.7

2000

8.1

1988

7.0

1981

6.5