2007

2.5

2001

7.4

2000

7.6

2009

5.2

1994

7.8

2002

6.3

2002

5.6

2005

7.5

1986

5.5

1984

6.2

2010

3.7

1995

7.2

1993

7.9

2011

4.3

2000

4.9

2005

6.3

2008

3.4

2011

7.2

1984

4.9

1997

7.7

2007

3.4

2004

7.8