2013

7.7

2004

8.3

2011

8.1

2006

7.8

1998

7.1

2009

7.3

1997

8.1

1999

6.9

1986

7.7

1998

7.6

2012

8.4

1996

6.9

2011

7.3

2009

8.1

2008

7.8

2018

9.6

1993

6.6

2019

7.0

2011

6.1

2020

7.0