2003

6.1

2002

7.6

2004

8.0

2003

7.8

1985

6.9

1996

7.5

2005

7.0

2005

7.8

2000

7.1

1986

7.1

1999

8.0

2009

7.7

1992

7.5

1996

6.4

1995

6.7

1959

8.1

1967

7.7

1995

7.3

1990

6.5

2006

8.2