2002

8.4

1993

8.1

2010

7.8

2014

7.1

2009

7.0

1994

8.4

2003

7.8

2010

7.3

2016

7.3

2011

8.3

2019

7.5

1997

8.1

2001

7.6

1985

7.7

2015

7.5

1978

7.2

2005

7.5

2000

7.5

2008

7.4

2015

7.7