1996

4.2

2017

7.7

2003

8.4

2005

4.7

1996

7.0

2001

6.1

1987

0.0

1997

5.7

1998

0.0

1990

7.1

2004

6.7

1982

0.0

2012

7.8

2008

8.0

2013

6.9

1996

5.8

1984

0.0