1974

4.9

1975

5.6

2005

3.0

1988

4.3

2006

4.4

2005

4.1

1981

3.8

1962

6.6

1978

5.8

10.0

2009

3.9

2007

3.6

2011

4.3

1966

6.3

1981

6.3

1982

4.3

1976

3.5

2008

3.7

0.0

2025

0.0