1965

0.0

1970

7.0

1984

7.5

1985

4.6

1968

0.0

1987

4.8

1990

5.0

1993

7.3

1965

7.0

1996

6.4

1969

5.5

1992

6.0

2003

6.0

2001

0.0

1967

0.0

1988

0.0