2003

5.2

1972

6.7

1998

6.0

1986

6.2

1991

7.1

1986

6.4

2002

6.4

1979

6.3

1981

6.1

1982

6.1

1987

5.7

2004

1.8

2004

5.2

2004

6.6

1982

6.7

1984

5.6

2005

6.3

1984

0.0

2006

6.0

2001

7.3