1992

7.0

2000

7.3

2005

4.5

1967

7.2

1975

6.8

1960

0.0

2004

10.0

1969

7.1

1991

7.6

1999

8.1

1994

8.2

2006

7.8

1991

5.7

1999

7.5

1996

8.0

2005

6.8

2001

7.8

1996

6.9

1961

6.8

2004

5.7