2011

5.4

2000

6.9

2017

7.5

2002

7.4

2015

7.5

1997

7.2

2010

8.2

2000

8.2

1985

8.3

1999

8.0

2009

7.6

2023

8.0

2010

8.4

1968

8.1

1976

7.8

2012

7.4

2006

5.7

1972

7.9

2012

8.2

2010

7.7