There is no single indicator in national accounts data, as published by the CSO, which determines the annual worth of tourism to Ireland in economic terms and, therefore, no sectoral breakdown. Fáilte Ireland does estimate a figure for total tourism revenue using data from the CSO and some other sources and this is available on the agency's website. For ease of reference, the total revenue figure published by Fáilte Ireland for 2016 was €8.389 billion. Of this, €6.613 billion arose from foreign exchange earnings (including carrier fares) and €1.776 billion from domestic sources. Figures for 2017 are yet to be published.