2009

10.0

1977

8.0

1981

6.6

1960

7.2

1974

8.6

1976

6.7

1998

6.0

1985

7.2

1994

8.7

1985

6.6

1972

7.9

1955

6.3

2012

9.7

1990

7.4

1950

7.6

1968

7.6

1959

6.8

1991

7.5

1995

5.9

1964

7.8