Djibouti's gross domestic product expanded by an average of more than 6 percent per year, from US$341 million in 1985 to US$1.5 billion in 2015. The Djiboutian franc is the currency of Djibouti. It is issued by the Central Bank of Djibouti, the country's monetary authority. Since the Djiboutian franc is pegged to the U.S. dollar, it is generally stable and inflation is not a problem. This has contributed to the growing interest in investment in the country.