1990

6.6

1983

6.0

1987

7.4

1984

7.4

2005

7.6

2003

8.1

2006

9.0

2002

0.0

1993

0.0

2008

0.0

1967

7.5

1978

7.0

2007

7.5

1990

7.3

2020

0.0

1987

0.0

1989

4.5

2001

8.0

1999

7.0

2003

7.1