1996

7.6

2006

7.5

2005

6.7

1999

8.0

2004

6.3

2001

6.8

2003

7.7

1996

7.7

1991

7.3

1976

7.2

2003

9.0

1997

7.5

1998

7.7

2014

8.1

2008

4.0

1993

6.1

2024

0.0

2008

6.1

2019

7.1

1975

6.5