1982

4.5

1972

8.6

1997

6.5

2002

8.0

2010

7.0

2009

7.3

1973

5.0

1960

5.0

1999

7.0

1959

5.2

1985

6.7

1980

6.8

1984

8.1

1958

6.7

1990

6.8

1974

7.6

1995

6.2

1950

0.0

1984

6.5

1973

6.9