1995

6.3

1990

6.1

2000

7.6

1996

4.6

1994

4.0

1986

6.0

2010

7.7

1990

5.8

1998

0.0

2009

6.7

1995

7.3

1990

7.4

2010

5.6

2005

7.5

1997

6.5

1993

6.2

1993

1.0

2008

5.5

1987

7.2