1998

3.2

2012

6.8

2005

7.3

1994

3.8

1996

3.0

1995

9.0

1999

6.4

1992

7.4

1995

3.5

2000

5.7

2001

8.2

2002

2.0

1997

8.3

2004

7.6

2005

4.5

1994

5.0

1993

8.4

1996

3.3

2008

5.4

1994

6.0

2001

7.7