1964

7.9

1996

8.1

1969

7.2

1959

6.0

1971

5.0

1984

7.5

2001

0.0

2005

6.2

1985

8.0

1970

6.1

1991

7.6

2010

6.4

1996

0.0

1984

2.0

1977

5.8

1990

7.3

2003

8.4

2013

6.5

2004

8.0

1978

0.0

1985

6.4

1966

6.5

1966

5.7

1976

5.8

1999

6.3