Una mostra d&#39;anàlisi de dades obertes de <a href="http://data.gov">data.gov</a> <a href="http://blog.cgpgrey.com/how-many-americans-have-a-passport-the-percentages-state-by-state/">http://blog.cgpgrey.com/how-many-americans-have-a-passport-the-percentages-state-by-state/</a><br>
<br>Raf<br>