1967

7.3

1965

6.3

2009

6.3

1956

7.1

1971

7.4

2009

7.3

2014

6.2

1968

6.5

2016

6.1

1957

7.2

2014

6.5

2007

6.6

1964

6.8

2005

4.8

1978

6.4

2017

5.2

1979

6.1

1969

6.7

2011

5.7

2017

5.9