2004

6.6

1997

7.4

1973

7.1

1999

7.3

1967

7.5

1990

7.0

1993

6.2

1995

8.0

1971

4.8

1996

7.8

2006

7.4

1990

5.8

1977

7.0

2002

4.8

1978

6.9

2004

4.9

2026

0.0

2002

6.8

2000

6.4

2003

6.1