1994

7.5

2004

8.6

2003

7.2

2007

8.1

2018

7.8

2011

7.4

2012

7.4

2002

7.9

2000

7.8

1993

7.2

7.2

2016

7.9

2003

7.7

1991

7.3

2012

8.1

2005

7.3

1999

7.0

2009

7.6

1996

7.3

2011

7.3