2002

4.8

1980

1.0

1969

2.8

1999

6.8

1998

6.6

2004

6.3

1972

6.9

1980

2.0

1976

2.0

1990

5.7

1990

4.2

1995

3.3

1988

5.0

2003

5.9

2001

7.3

1997

6.8

1999

7.0

2005

6.7

2005

6.8

1993

3.5