1987

6.8

1970

6.0

2008

0.0

0.0

2017

7.1

1980

7.0

1961

6.7

2016

5.3

1961

7.7

1969

5.7

1991

5.6

1972

7.4

1981

6.6

1986

6.8

1994

6.2

1976

7.3

1985

6.5

1972

7.2

1967

6.5

2009

6.7