2005

7.2

2013

6.5

2010

4.6

2005

5.7

1971

7.7

1994

7.5

1979

7.6

1963

7.1

1966

6.2

2017

6.9

2015

7.4

1966

6.4

2013

6.6

2008

8.0

2014

7.3

1988

5.5

1999

5.7

1989

7.2

2020

7.3

1959

7.3