2003

5.6

2012

6.3

1987

6.5

1985

6.1

2014

7.3

1990

5.8

2014

7.0

2012

6.3

1994

6.5

2009

5.3

2008

6.7

2016

5.4

2002

6.0

1968

6.3

1992

6.4

2011

6.4

1998

6.0

2011

6.6

2010

6.6

2004

6.0