2015

0.0

1999

7.6

2005

5.8

1996

3.3

1985

4.1

2002

5.6

1993

5.6

2007

7.1

1995

5.0

2002

5.0

1998

5.7

2009

3.3

2005

0.0

1988

5.5

1997

6.4

2006

7.2

1997

6.5