According to the EIA, the one year increase in Saudi petroleum consumption from 2004 to 2005 was 360,000 bpd (Total liquids, from 1.64 mbpd to 2.0 mbpd)--a 22% year over year increase. And the average Saudi family has something like six or seven kids.

KSA population is forecast to grow by 40%. The state is responsible for providing housing, food, jobs, etc.

WT: Trivia: KSA uses 74% as much oil as India (whose economy is 10.5X larger).