1996

3.7

2006

5.6

1962

4.1

2003

0.0

1968

6.3

1981

0.0

1971

6.0

1961

4.8

1967

6.5

1972

0.0

1961

6.0

2005

5.0

1987

5.3

1978

7.5

1997

7.0

2008

3.8

1992

0.0

2005

4.0

1977

5.5