1986

6.7

1988

7.8

1986

7.5

2009

1.3

1999

6.3

2005

3.5

2006

5.0

2003

5.1

2006

4.7

2006

6.6

2006

2.5

2004

2.9

1998

7.8

1988

8.0

1986

6.4

2013

4.5

1993

5.7

1991

7.3

2004

7.5

2009

1.5