1982

6.0

2006

7.0

2005

8.1

2004

6.8

1986

7.2

2007

6.8

2011

6.6

2007

5.4

1992

5.1

1984

6.3

1984

7.2

1980

8.4

1983

7.9

1999

6.6

1980

6.4

1999

6.7

1991

5.7