2008

8.9

2015

7.4

2011

7.3

2016

7.1

2002

7.5

1990

6.9

1988

8.0

2014

7.9

2003

7.9

1962

6.9

2012

7.0

2011

7.2

2002

8.6

2020

7.4

2011

7.6

2013

7.6

2001

8.1

2007

7.7

2009

8.0

2005

7.0