A/HRC/39/45 had been sought from the parties. The Working Group notes, however, that an increased response rate does not necessarily imply increased enforcement of its opinions. 72. In addition, recent communications reports of the special procedure mandate holders reveal a slightly lower rate of response (just above 50 per cent) to urgent appeals sent by the Working Group alone or together with other special procedure mandate holders. 73. However, while referring to Human Rights Council resolution 33/30, in which States were reminded to cooperate fully with the Working Group, the Working Group notes with concern that this increased cooperation by States does not extend to its requests for country visits. The Working Group regrets that, despite numerous requests and the fact that many Governments have issued a standing invitation to special procedure mandate holders to visit their countries, no State has confirmed the dates for an official country visit by the Working Group in 2018. 74. Finally, the Working Group notes with grave concern that it continues to receive information, including in the context of its follow-up procedure, on reprisals suffered by individuals who have been the subject of an urgent appeal or an opinion or whose cases have given effect to a recommendation of the Working Group. V. Recommendations 75. The Working Group reiterates the recommendations made in its previous reports. 76. The Working Group calls on Member States to continue to increase their cooperation, especially by responding positively to requests for country visits, through their responses to urgent appeals and communications, and by enforcing the Working Group’s opinions, with a view to preventing and/or eradicating arbitrary detention. The Working Group urges States to continue to engage actively with its follow-up procedure with regard to the implementation of the recommendations made in its opinions. 77. With reference to Human Rights Council resolution 33/30, and in order to allow the Working Group to fulfil its mandate in an effective and sustainable manner, the Working Group encourages Member States to continue to provide it with the necessary human and material resources. 78. The Working Group also reiterates its call on the States concerned to take appropriate measures to prevent acts of reprisal against individuals who have been the subject of an urgent appeal or an opinion or whose cases have given rise to a recommendation of the Working Group, and to combat impunity by bringing perpetrators to justice and by providing victims with appropriate remedies. 30