In 1506, about 65% of the state income was produced by taxes on overseas activity. Income started to decline mid-century because of the costs of maintaining a presence in Morocco and domestic waste. Also, Portugal did not develop a substantial domestic infrastructure to support this activity, but relied on foreigners for many services supporting their trading enterprises, and therefore a lot of money was consumed in this way. In 1549, the Portuguese trade center in Antwerp went bankrupt and was closed. As the throne became more overextended in the 1550s, it increasingly relied on foreign financing. By about 1560, the income of the Casa da Índia was not able to cover its expenses.