1989

8.0

2007

7.0

2001

7.3

2021

8.5

2007

6.7

2004

6.2

1993

8.2

1997

5.6

2002

0.0

2006

6.0

2009

7.2

2001

7.5

1991

7.8

2001

8.3

1990

7.9

2013

9.5

1961

7.0

1992

10.0

1976

7.2

1999

7.9