1997

0.0

2005

5.1

1985

7.4

2006

6.2

2004

5.5

2006

5.3

1998

6.0

2001

9.0

1999

7.3

2016

0.0

2002

6.0

2012

6.8

1993

3.5

1987

4.5

1955

0.0

1968

6.2

2012

0.0

2017

8.0

2014

0.0

2012

0.0