1992

7.5

2010

8.1

1978

7.7

2003

6.6

2006

5.5

1996

3.3

2001

6.1

2002

6.7

1990

0.0

1999

6.5

1994

0.0

1994

0.0

1994

0.0

1992

0.0

1986

2.0

1992

7.0

1985

7.5

1999

6.6

2002

7.4

2003

7.6

2010

6.6

1988

6.3