2009

7.5

2008

6.8

2002

6.2

2009

3.8

2020

1.0

2004

5.4

2004

3.0

2003

4.0

1992

5.0

2000

5.7

2003

6.2

2007

6.9

1991

5.5

1974

3.4

2007

6.3

2011

5.1

2006

4.9

1989

6.0

2004

3.5

1996

7.7