2005

6.5

1970

7.1

1954

7.6

1957

7.8

1965

8.1

2006

6.5

1972

7.2

2004

7.3

1999

6.0

1989

5.9

1976

6.6

1978

6.4

2004

5.9

2005

7.7

1959

4.0

2017

7.8

2015

6.7

1962

6.9

1998

7.4

1993

6.1