The Great Wall of China

6

/

2011

8

/

2018

8

/

2015

4.7

/

2015

5.9

/

2014

0

/

1989

4.2

/

2016

0

/

2007

9

/

2021

7

/

2019

0

/

NaN

5.748

/

2003

5.501

/

2008

7.501

/

2002

6.5

/

2010

6

/

2010

7.906

/

1998

6

/

2008

6.508

/

2004

6.1

/

2009