1988

5.2

2013

4.8

2002

0.0

1997

8.1

2009

8.0

1996

6.5

2000

7.6

1998

5.0

1994

6.7

1998

6.5

1997

5.0

1989

5.5

2004

4.5

1999

6.3

1996

3.3

1993

7.0

2005

6.7

1999

5.1

1994

6.7

2005

7.8

1991

8.0

1988

8.3