2005

6.7

1962

7.7

1962

7.6

1986

7.3

2001

7.0

1967

7.3

1968

7.1

1999

7.0

1996

7.5

2003

7.4

1995

7.2

2003

7.2

1993

6.2

1972

7.1

1987

8.1

1996

6.0

2015

6.5

1991

6.3

1986

6.7

2007

6.2