We recently discovered a great website 100people.org and in their statistics section, they analyse how the world would look if it just contained 100 people i.e. how many have clean drinking water, suffer from malnutrition, profess a particular faith or none, are literate, etc.
Why not have a look, and see how the figures (all with sources) could help you to put your case for support even more clearly. What are the comparable figures for your beneficiary group?
The link above shows more detailed statistics and the sources.