2003

0.0

1997

7.4

2006

8.0

1992

7.7

1987

7.7

1998

7.5

2002

7.0

2003

7.9

2005

7.5

1993

7.0

2007

7.1

1992

7.5

2006

7.7

2006

7.5

2006

7.0

1994

3.0

1998

7.2

1991

6.4

1990

7.4

1961

5.0