1997

7.2

1991

5.0

2001

5.6

1996

5.0

2002

4.2

1996

6.6

2001

5.6

1998

6.0

1995

7.7

1992

5.4

1981

4.5

2003

5.0

1999

6.3

1996

6.1

1997

8.3

1999

2.8

2001

5.5

2002

7.2

2001

6.9

2000

10.0

1995

7.8

2002

5.4

1997

6.7

2008

4.2

1994

6.0