2009

6.3

2002

5.4

1998

4.4

1964

3.0

1996

6.5

1997

5.1

2003

5.5

2003

6.3

2002

4.3

1997

5.4

1993

6.2

2001

6.2

2003

5.6

1981

7.2

1966

3.5

1967

4.3

1994

5.2

1996

5.4

2001

5.8

1993

6.5