2004

4.5

2006

7.4

2002

5.5

2000

3.7

2003

4.5

1993

8.0

1996

5.0

1990

7.4

2001

7.6

1992

6.8

2008

6.1

2013

0.0

1984

7.5

1995

5.8

2016

7.1

1998

5.1

2004

7.7

2014

6.1

2011

5.4

2013

7.6

1992

6.0

2008

5.6

1993

6.6

1995

5.6

2011

7.2

2007

7.5