The Rio markers are descriptive, allowing for approximate quantification of financial flows. Not all climate-related ODA is reported to the UNFCCC as climate finance: out of total bilateral climate-related ODA in 2013-2014 (USD 25.1 billion on average per year), only a share is reported as climate-finance (preliminary estimate: USD 19.1 billion on average per year). This reflects how Party reporting to UNFCCC, whilst often based on, is not directly comparable to the DAC climate-related development finance statistics.