Non-nationals make up more than half of the population of Bahrain, with immigrants making up about 55% of the overall population.  Of those, the vast majority come from South and Southeast Asia: according to various media reports and government statistics dated between 2005-2009 roughly 290,000 Indians, 125,000 Bangladeshis, 45,000 Pakistanis, 45,000 Filipinos, and 8,000 Indonesians.
Question: How many years do the statistics cited span across?
Answer: 4; 4