2006

5.9

1975

6.7

1979

4.8

1992

5.6

0.0

1990

8.0

1984

6.3

2010

5.8

1978

5.0

1973

6.1

1979

6.2

1976

6.7

1974

5.9

1982

5.4

1994

6.8