2004

4.2

2008

4.3

1995

0.0

2009

5.4

1979

6.1

2004

6.8

1985

5.3

1985

6.0

1998

6.0

2003

6.2

1997

5.5

1967

6.1

1991

6.0

1992

5.5

1986

5.8

2001

6.4

1977

6.5

1981

5.5

1999

3.9

1996

5.2