This is an example CSV file
The text at the top here is not part of the data but instead is here
to describe the file. You'll see this quite often in real-world data.
A -1 signifies a missing value.

year;London;Paris;Rome
2001;7.322;2.148;2.547
2006;7.652;;2.627
2008;-1;2.211;
2009;-1;2.234;2.734
2011;8.174;;
2012;-1;2.244;2.627
2015;8.615;;