1984

7.7

1996

5.9

1988

7.2

1992

7.3

1989

0.0

1989

0.0

2005

7.5

1988

7.1

1997

6.2

1978

6.5

1986

7.3

1967

6.1

1970

5.3

1988

0.0

1983

7.0

1991

5.9

1990

7.6

1984

10.0