1996

2.3

1998

5.7

2001

6.3

1995

6.2

2003

5.6

2004

4.5

2000

5.0

2001

6.5

2003

5.2

1969

7.0

1981

10.0

2009

0.0

1984

6.0

1982

0.0

1990

7.4

1990

2.3

1984

2.7

1984

6.7

1992

6.2

1979

3.7

2001

5.3

1999

5.5

1998

8.4

1986

6.8

1980

0.0

2001

6.5