2013

6.6

1995

6.4

1977

6.8

1998

0.0

1971

6.4

2005

8.2

1973

7.2

1975

5.4

1977

4.6

1976

7.2

1973

6.4

1972

7.9

2007

8.1

1971

5.0

2000

8.5

1970

5.3

2002

7.9

1984

7.3

1984

6.2

1981

5.6

1970

7.5

2012

7.1