In recent years, Alajuela has attracted many export-orientated manufacturing companies, especially within the free trade zones around the municipality of Alajuela. Free trade zones include Coyol, Saret, Montecillos, and Bes, among others. Alajuela's free trade zones are mostly industrial in nature. The increase in manufacturing, which began in earnest in 2004, has created strains on the province's infrastructure, including water distribution, transportation density, and electric output. When a hydroelectric plant was constructed in Grecia in 2012, construction upstarts doubled within two months. Industry-related construction accounted for the largest growth. Major companies in these zones include medical equipment manufacturers like Allergan, Baxter, Hospira, and Boston Scientific.