The Great Wall of China

0

/

2007

0

/

1989

0

/

NaN

9

/

2021

8

/

2018

6

/

2011

4.7

/

2015

8

/

2015

4.2

/

2016

5.9

/

2014

7

/

2019

7.906

/

1998

6.338

/

2005

6.404

/

1991

7.298

/

2008

7.499

/

2002

6.7

/

1990

6.021

/

2008

6.509

/

2004

6.225

/

2017