Tourism is the mainstay of the small open Aruban economy, together with offshore banking. Oil refining and storage ended in 2009. The rapid growth of the tourism sector over the last decade has resulted in a substantial expansion of other activities. Over 1.5 million tourists per year visit Aruba with 75% of those from the US. Construction continues to boom with hotel capacity five times the 1985 level. Tourist arrivals rebounded strongly following a dip after the 11 September 2001 attacks. The government has made cutting the budget and trade deficits a high priority.