This data is sourced from Annex 1 of the WEOG (2015) Global Monitoring Plan for Persistent Organic Pollutants under the Stockholm Convention Article 16 on Effectiveness Evaluation 2nd Regional Monitoring Report Western Europe and Others Group Region pp 216, http://chm.pops.int/Implementation/GlobalMonitoringPlan/MonitoringReports/tabid/525/Default.aspx.