1997

6.9

1970

6.6

2006

7.0

2005

7.1

1960

4.7

1998

7.3

1999

6.4

1993

6.7

1992

7.4

2001

6.4

2025

0.0

2003

6.6

1995

7.5

1997

7.9

2004

7.9

2001

7.1

1980

7.1

1988

7.7

2007

7.9

1986

5.0