2005

6.5

2005

6.2

2002

7.1

1989

7.3

2001

5.4

2001

5.5

1999

5.7

1986

6.6

1993

6.9

2017

6.7

1997

6.7

2017

6.4

1992

6.1

2007

6.3

1999

7.0

1966

7.2

1994

7.5

1998

6.7

2000

6.8

1987

6.6