n

7.3

/

2012

4.5

/

2005

3.5

/

1979

5.8

/

1966

6.6

/

1975

5

/

2010

6.8

/

2017

4.5

/

1971

4.5

/

2003

5.3

/

1984

5

/

1963

6.9

/

1988

7.4

/

2016

9

/

1963

5.8

/

2008

4.8

/

2008

6.9

/

2003

5.7

/

2000

5.8

/

2002

6

/

2005