I'd call that a bar chart.
The SVG was made in Inkscape. It says so in the XML
<!-- Created with Inkscape (http://www.inkscape.org/) -->
And since it's already an Inkscape SVG, you can just open it and edit it in Inkscape, which is a free and Open Source vector image editor.
There are no specific, valid-for-anything, rules when designing, but in your particular case it feels like some more whitespace is needed (which you seem to be anticipating yourself). So try:
more space in between list entries (car, tree, etc)
more space above car, and identical value below soup
shift the entire list and header to the right, touching the ...