1996

5.3

1991

2.0

1995

2.0

1974

5.9

2012

4.4

1988

7.5

1973

5.5

1970

5.0

1992

5.7

2009

7.9

2000

3.5

1983

0.0

1992

0.0

1985

6.2

2005

1.0

1976

5.8

1972

5.0

1990

0.0