2011

4.5

2009

8.0

2000

7.6

1987

0.0

1998

6.5

1990

7.4

1993

5.5

1991

6.6

1999

6.3

1991

7.4

1988

6.5

1979

6.8

1990

5.5

2002

0.0

1987

7.7

1985

7.5

1997

7.3

1995

4.2

2011

6.2

1987

5.5