1962

7.0

1961

7.0

1971

7.1

1984

8.0

1994

4.6

2005

4.8

1955

3.0

1991

3.1

1975

0.0

2007

5.8

1966

0.0

2000

5.8

1989

0.0

2002

5.5

1967

6.9