1998

6.2

1972

5.8

1995

6.7

2006

6.4

2004

4.5

2007

5.8

2001

4.7

1987

6.2

1991

6.6

1985

5.1

1954

8.1

1998

3.5

2008

5.9

2006

5.3

2009

5.3

2005

5.0

2014

4.9

2000

2.3

2008

4.8

2002

0.0