2004

8.3

1998

7.2

1994

6.8

1993

6.7

2010

6.7

1996

5.4

1992

6.8

2005

8.2

2022

7.0

2009

8.0

1989

7.7

2001

6.6

1988

8.0

2005

7.7

2015

7.5

2004

8.6

2010

7.8

1969

8.2

1972

7.9

2011

6.7