2001

6.8

1993

5.1

2000

6.7

1997

5.1

1999

5.6

1984

4.0

1985

7.2

1995

6.6

1991

4.0

2013

0.0

1991

5.8

2003

6.9

1987

6.0

1990

7.0

1996

7.7