2003

7.3

2000

9.4

1988

7.4

2009

6.4

1998

6.2

2002

5.8

1989

9.3

2008

5.6

1994

7.4

1999

7.4

2006

6.3

2002

6.5

2002

6.6

2015

6.9

2013

4.0

2008

7.7

2003

5.6

2008

6.1

1992

5.3

2013

6.9