1990

5.8

2001

5.2

2001

4.3

1994

1.5

1989

5.2

1990

5.5

2002

4.8

2000

6.7

2003

7.6

1986

5.8

1990

6.3

1999

7.7

2008

2.3

2001

7.6

1988

6.8

2001

6.0

1990

6.7

2001

6.9

1986

6.8