1999

6.0

1992

7.1

2003

6.7

1987

6.5

1997

7.1

2006

6.0

1983

5.7

2001

7.3

1999

3.7

1999

6.6

1994

5.8

2017

6.6

1965

6.0

2004

6.5

1990

6.4

2006

6.4

2001

5.7

1962

6.8

2009

5.5

2002

5.7