1963

7.5

1957

7.2

2015

7.6

2015

5.5

2002

6.2

2020

5.8

2016

5.9

2004

6.7

2011

5.2

2000

6.6

2005

6.4

1965

7.3

1996

6.5

2011

6.0

2008

7.6

2010

7.0

2017

4.4

2010

5.6

1986

6.7

1997

6.1