2004

5.1

1982

6.6

1996

7.2

1963

5.7

2017

5.7

1985

6.0

2014

6.1

1969

5.5

1977

7.0

1983

6.1

2006

4.9

2006

5.4

1976

6.6

2016

6.7

1964

7.9

1970

6.4

1987

7.6

1972

7.2

1974

6.8

1978

6.8