2002

7.1

1985

7.8

1995

8.1

2005

6.0

2005

6.8

1962

8.0

1987

8.1

1998

7.7

2016

7.0

1993

7.9

1988

7.7

2005

7.2

1996

7.4

2004

7.5

2007

7.9

1991

7.6

1979

7.0

1971

5.2

1975

7.0

2012

4.8