Official figures on wartime damage published in Croatia in 1996 specify 180,000 destroyed housing units, 25% of the Croatian economy destroyed, and US$27 billion of material damage. "Europe Review 2003/04" estimated the war damage at US$37 billion in damaged infrastructure, lost economic output, and refugee-related costs, while GDP dropped 21% in the period. 15 percent of housing units and 2,423 cultural heritage structures, including 495 sacral structures, were destroyed or damaged. The war imposed an additional economic burden of very high military expenditures. By 1994, as Croatia rapidly developed into a de facto war economy, the military consumed as much as 60 percent of total government spending.