2005

5.5

2018

6.8

2011

6.2

2006

6.0

2001

6.7

2000

5.8

2004

7.4

1991

7.8

2005

6.3

1991

6.9

2003

0.0

2002

7.7

1984

6.7

2001

5.2

2002

7.2

2005

5.4

2003

7.6

2002

6.6