2004

6.4

1959

5.2

1988

5.0

1984

5.6

2001

5.4

1970

6.5

2001

6.7

1990

6.7

2017

6.1

1951

5.5

2000

6.7

1988

6.3

1972

6.2

1999

6.1

2003

5.3

1963

6.8

1974

5.0

2002

7.1

2006

5.6

2017

7.1