1991

2.4

2001

6.8

2014

4.3

1999

7.9

1998

3.7

1989

6.7

1980

1.0

2004

7.4

1996

3.5

1981

4.0

1995

1.0

2005

9.0

0.0

1996

1.8

1979

6.7

1990

5.5

2000

3.0

1996

3.8

2008

4.7

2001

6.8

2002

8.2

2007

5.0

1998

5.3