2004

8.3

0.0

2000

7.6

1999

7.5

2020

8.0

2014

7.7

1982

6.9

1984

4.5

2009

6.6

2002

8.5

1997

8.1

1998

7.4

2005

7.1

2007

6.8

1985

6.8

2004

8.4

1989

6.6

2005

8.1

1997

5.6

2007

0.0