2012

3.0

1985

4.9

1993

5.1

1992

4.4

1996

5.7

1993

6.5

2000

7.6

1995

7.3

1990

7.4

2007

8.1

1996

6.0

1989

8.0

1986

0.0

1990

8.0

1988

5.8

1987

5.8

2010

7.1

1988

5.0

1987

6.5

2008

8.4

2006

7.3