1995

6.7

2002

7.2

1972

6.9

2005

5.5

1975

3.8

1993

3.5

2002

4.8

2004

5.6

1987

7.3

1999

7.4

2003

5.9

1988

5.0

1970

0.0

2006

5.4

2004

4.8

2001

6.1

1982

4.2

1974

3.3

1993

5.0

2004

5.5