2017

6.7

1983

7.1

2006

5.5

2021

7.1

1975

7.2

2018

6.3

2018

5.0

1965

7.4

2016

7.9

2014

7.5

2000

6.7

2016

5.9

1998

5.7

2017

6.3

2014

4.8

2009

6.9

2013

5.7

2007

6.6

1972

6.2

1986

6.5