2005

7.8

2004

7.9

2000

8.0

1994

7.6

2016

7.2

1998

7.2

2009

7.3

1992

6.9

1993

7.9

2013

7.1

2014

7.8

2017

7.5

2001

7.6

2016

7.6

2003

7.6

2007

6.7

1990

8.1

2011

6.9

2003

7.5

2001

7.8