1973

6.8

1981

1.0

1980

0.0

1972

5.5

1971

5.2

1997

4.5

1977

5.0

2008

5.7

2013

5.5

2005

5.7

1981

7.4

1953

6.0

2012

4.9

2003

6.0

2001

5.4

2006

0.0

2003

9.0

1999

6.5

2006

4.2

1978

0.0