2015

5.8

2009

6.6

2002

4.6

1983

6.3

2008

7.9

2006

7.0

2013

6.1

2013

4.6

1999

8.0

1993

6.5

2010

6.1

1998

6.1

2009

7.2

2004

5.7

2010

6.2

1980

7.1

1998

7.8

1995

5.7

2015

7.2