1979

5.0

1968

5.6

1964

5.5

1962

6.8

1966

5.0

1973

5.5

1965

5.5

1994

5.9

1971

6.0

2005

8.1

1972

5.0

1973

4.4

1983

5.8

1966

4.5

1966

5.0

1986

4.4

1985

4.8

1978

4.3

1973

4.1

1962

4.5

1963

6.5

1971

5.0

1965

5.3