2009

6.6

2013

4.3

2012

6.1

2012

5.8

1993

5.5

2007

0.0

2011

3.1

2005

3.8

1974

3.8

1961

4.4

1954

0.0

1976

5.6

1973

5.4

1997

5.1

1997

6.5

1995

0.0

1998

6.2

1975

5.7

1966

4.7

1955

0.0