1964

0.0

1962

7.0

1961

7.0

1971

7.3

1984

8.0

1972

0.0

1994

4.6

2005

4.5

1955

3.0

1974

0.0

1991

3.4

1975

0.0

2007

6.2

1966

0.0

2000

5.7

1989

0.0

2002

5.3

1967

6.9