1976

7.0

1976

2.0

1986

6.1

1968

7.4

1996

6.4

2000

4.8

2002

5.3

1983

0.0

1995

7.6

1992

7.1

1974

7.2

1985

2.0

2011

5.0

1996

7.6

1991

7.0

1972

6.4

1984

6.7

1987

6.8

2003

7.6

1975

7.7

1987

7.1

1988

6.2

1990

7.4