A/HRC/28/41 of Palestine) were added to the list of those that have extended a standing invitation to special procedures, reaching a total of 110 (see annex III). 6. Over the years, 167 States (or 86.5 per cent) have accepted requests for country visits, and 166 have been visited by at least one special procedures mandate holder. A total of 26 States (or 13.4 per cent) have never received or accepted any request for a visit by one or more mandate holders (see annex IV). D. Communications 7. In 2014, the special procedures addressed a total of 553 communications to 116 States; 451 communications were sent jointly by more than one mandate holder. Communications covered at least 1,061 individuals, 179 of whom were women. A total of 237 replies were received (equivalent to 42.7 per cent of communications). A total of 135 communications were followed up by mandate holders (see annex V). Responses varied from acknowledgement of receipt to more substantive replies. Three communications reports were submitted to the Human Rights Council at its sessions. 2 8. Following opinions issued by the Working Group on Arbitrary Detention qualifying the detention of a complainant as arbitrary, in 2014 the Working Group received information on the release of 17 individuals and 230 military officers. 9. In 2014, the Working Group on Enforced or Involuntary Disappearances transmitted 259 new cases of enforced disappearances, of which 69 under the urgent action procedure. The Working Group clarified 47 cases. E. Thematic reports and studies 10. In 2014, 135 reports were submitted to the Human Rights Council (including 64 country missions reports) and 36 to the General Assembly (see annex VI). 11. Some newly appointed mandate holders focused their first report on their methods of work and priorities; this was the case of the mandate holders on the sale of children, child prostitution and child pornography; the effects of foreign debt and other related international financial obligations of States on the full enjoyment of all human rights, particularly economic, social and cultural rights; adequate housing as a component of the right to an adequate standard of living, on the right to non-discrimination in this context; the situation of human rights defenders; the right to food; the enjoyment of all human rights by older persons; the rights of indigenous peoples; contemporary forms of slavery, including its causes and consequences; and the implications for human rights of the environmentally sound management and disposal of hazardous substances and wastes. 12. A number of outgoing mandate holders recapitulated the achievements of their mandate in their last report; this was the case of the mandate holders on the sale of children, child prostitution and child pornography; the rights of indigenous peoples; the effects of foreign debt and other related international financial obligations of States on the full enjoyment of all human rights, particularly economic, social and cultural rights; trafficking in persons, especially women and children; the right to food; the situation of human rights defenders; extreme poverty and human rights; and the human right to safe drinking water and sanitation. The final report submitted by the Special Rapporteur on the situation of human rights in Cambodia included reflections on the work of the mandate holder during 2 4 A/HRC/25/74, A/HRC/26/21 and A/HRC/27/72.