1974

6.0

2004

5.6

1990

7.7

1984

7.0

2005

7.1

1963

0.0

1997

6.1

2007

5.0

1968

7.6

1976

6.2

1962

4.8

2008

6.3

2007

4.8

1988

8.0

2006

6.7

1973

7.5

1973

0.0

1991

5.5

1982

5.0

2017

6.8