2002

6.8

2001

6.5

1987

6.5

2001

6.5

1989

6.6

2008

6.8

1999

6.1

2003

6.1

1993

5.6

2002

7.0

1959

5.7

1990

6.0

1978

7.5

2004

7.2

2005

7.5

1997

6.6

1995

7.7

1994

5.4

2001

4.4

2014

6.8