1991

6.4

1994

5.3

2008

3.8

1991

5.0

2002

5.4

1994

6.4

1997

4.7

1999

4.1

1996

6.0

1990

0.0

1996

6.6

1985

7.7

1997

5.3

1997

1.0

1986

5.9

1998

5.5

1995

4.1

1995

6.4

1995

6.7

2005

8.3

1990

6.0

2001

2.0

2001

6.9

1994

6.1

1995

7.7

1993

5.1

1999

4.3