1996

6.4

1970

0.0

2007

4.0

2009

6.6

2006

5.3

2013

8.5

2010

5.2

1988

6.3

2005

5.3

2002

6.8

2003

5.9

1970

7.2

2001

7.3

2016

3.3

1964

7.1

1997

6.1

2005

4.0

1998

0.0

1963

7.6

2005

5.5