The economy of Eritrea has experienced considerable growth in recent years, indicated by an improvement in gross domestic product (GDP) in October 2012 of 7.5 percent over 2011. However, worker remittances from abroad are estimated to account for 32 percent of gross domestic product. Eritrea has an extensive amount of resources such as copper, gold, granite, marble, and potash. The Eritrean economy has undergone extreme changes due to the War of Independence.