1984

6.1

2016

6.1

1998

6.6

1998

6.6

1963

5.8

2007

5.6

1952

7.0

2006

5.5

1985

6.2

1976

6.4

1955

7.3

1986

7.1

2004

6.2

2004

6.1

1985

5.9

1964

6.3

2002

7.7

2002

7.7

1983

6.1

1975

6.8