That's Trillion with a "T"

According to MEED:

The economies of Saudi Arabia, UAE, Qatar, and three other oil producing countries (Kuwait, Bahrain and Oman) are growing rapidly thanks to a five-fold rise in crude oil prices since 2002. These states are investing their oil revenue windfalls to develop their infrastructure and power. MEED, which tracks project announcements in the construction, industry, oil and gas, petrochemicals, power, and water and waste sectors, said the total estimate costs of projects in the Gulf now exceed $2 trillion, a 40% increase compared with a year earlier.

Also,

Qatar Approves 2008-2009 Budget with $2 Billion Surplus
The Arab Market Worth $1.4 Trillion