2017

5.2

2002

6.3

1988

5.0

1962

7.7

2003

7.2

1993

6.2

1997

6.7

2008

7.0

1986

6.6

2004

6.0

1993

7.0

1985

5.7

2006

6.7

1986

6.9

2004

7.0

2007

7.0

2002

6.4

2004

5.6

2001

6.2

2001

6.7