1966

7.6

2008

5.8

1991

5.3

1985

5.9

2001

6.6

1990

6.2

1993

6.2

1988

5.4

1977

6.8

1976

5.5

2004

6.5

1991

0.0

1985

4.0

2001

7.8

1978

5.3

2007

6.9

2003

5.8

1973

5.5

1969

1.0

1973

6.2