1996

6.4

1988

6.1

1998

6.5

2009

7.6

1994

3.6

1999

6.2

1985

5.9

1981

6.9

2002

6.9

1992

6.7

2005

7.7

1995

7.3

1995

0.0

2008

6.5

2012

7.2

2001

8.0

2002

5.5

1996

4.9

1996

7.0

1984

5.6

1995

4.0

1987

0.0

1990

7.9

1995

6.3

1987

8.0

1997

5.4

2003

7.5

1991

5.7

2002

6.3

1994

5.3