6.4

1975

4.5

2017

6.1

2016

6.7

2020

5.6

2007

6.5

2005

6.0

2015

6.9

1954

6.4

2020

6.3

2013

6.4

2000

5.3

2015

8.3

2003

6.3

1998

7.1

1993

7.8

2014

6.5

5.0

2019

7.0

2002

6.9