1992

7.0

1998

6.6

2004

6.4

1962

6.3

1967

7.1

2012

7.0

1982

0.0

2003

6.4

1993

5.4

2003

6.3

2001

7.7

1996

7.3

1975

7.3

1986

6.9

2006

4.4

2005

7.3

2016

5.0

2002

6.7

2005

6.7

1994

5.6