2013

5.1

2014

6.0

2011

0.0

2009

1.5

2009

1.3

2006

4.4

1987

7.3

2005

3.5

2006

5.1

1999

6.0

1982

0.0

2003

5.1

2005

7.0

1981

4.0

1986

7.5

2000

6.0

1994

6.0

1993

5.7

1991

7.3

1988

7.8