A building is seen under construction in Madrid Friday Feb. 5, 2010. Spain's once-buoyant economy has wracked up six straight quarters of decline since third quarter of 2008 as a boom fueled by real estate construction and consumer spending collapsed. Unemployment now stands at nearly 20 percent. The government's ballooning deficit is an acute source of worry for investors and markets fretting over whether Spain could be in line for a debt crisis like the one in Greece.