On Wikipedia the following generates a good pie chart in the entry Helium, but here and on Wikiversity, it and its called templates does this:
Estimated 2013 U.S. fractional helium use by category. Total use is 47 million cubic meters.
Cryogenics (32%)
Pressurizing and purging (18%)
Welding (13%)
Controlled atmospheres (18%)
Leak detection (4%)
Breathing mixtures (2%)
Other (13%)
Each of the mediawiki functions apparently work fine but "border-width" does not seem to want to give the correct arc. Help! As you can see, it also doesn't work here. Comments, suggestions are most welcome! Marshallsumter (talk) 18:09, 21 June 2015 (UTC)