2000

6.2

1995

6.7

2005

4.2

1994

6.8

1986

5.9

1984

7.5

1979

6.8

1999

6.0

1990

7.4

2001

7.6

1999

7.9

1984

6.2

1991

1.0

1984

5.2

2001

5.1

1994

6.0

1998

7.4

1999

6.5

1983

0.0

2006

0.0

2007

4.0

2002

4.8

2003

8.7

1998

6.9