2014

5.4

2004

1.0

2007

5.6

2005

7.2

1986

6.7

2004

6.3

1997

6.6

2003

7.2

2003

7.2

2001

6.9

1999

7.1

1995

6.3

1999

5.2

1982

6.2

2000

5.0

2005

6.2

2013

5.9

2010

4.3

1980

5.2

1968

5.4