2006

5.9

1975

6.7

1979

5.0

1992

5.7

0.0

1990

8.0

1984

6.3

2010

5.6

1978

4.9

1973

6.1

1979

6.1

1983

6.9

1976

6.7

1974

6.3

1982

5.3

1994

6.8