1993

5.8

1997

6.2

1992

6.8

2006

5.0

1985

7.0

2009

0.0

1980

4.3

2012

7.0

1997

8.1

2000

5.4

2000

6.0

2020

7.0

1997

6.0

1994

0.0

1986

6.2

2013

8.1

2004

7.5

2001

5.4

2000

8.2

1991

7.1

1984

8.0

1994

0.0

1996

10.0