2003

4.5

1998

5.5

1986

4.3

2000

6.1

1990

7.4

2001

7.6

1993

1.0

1995

5.8

1994

7.1

1997

6.3

2000

1.0

1989

2.8

1985

7.2

1974

5.0

1999

7.9

1980

5.1