2005

7.4

2004

4.3

1994

6.0

1976

3.0

1971

6.5

1995

0.0

1976

5.0

1993

5.6

2007

5.6

1973

5.7

1975

6.1

1983

6.0

2002

6.2

1988

5.9

1997

4.5

1972

5.9

2000

6.5

1975

6.0

1978

0.0