2001

8.1

2011

8.1

2005

7.7

2006

9.3

1990

6.8

1998

7.0

2023

10.0

2002

7.4

1993

8.0

2010

8.1

1985

6.6

2003

5.6

1960

7.4

2001

7.9

2004

7.2

1980

6.5

1999

7.9

2006

7.8

1996

7.7

2015

6.9