1964

8.0

2009

5.8

1998

6.8

1983

7.9

1990

7.4

2001

8.4

2013

5.9

1996

7.1

1994

8.7

1987

7.3

2014

6.5

2013

6.9

2023

7.5

2023

7.5

2003

6.3

2005

7.0

2010

7.2

2007

5.6

1988

7.3

2010

6.4