2006

7.0

2003

6.0

1997

6.8

2005

6.7

2005

6.2

1976

3.3

1969

2.8

2004

6.3

1976

3.5

1977

2.0

1981

5.4

1983

3.5

2002

4.8

1980

1.0

1992

6.6

2001

6.2

1976

1.0

2003

6.5

1990

6.8

1973

1.0