CAT/C/LTU/CO/2 page 10 22. While noting that some statistics have been provided, the Committee regrets the lack of comprehensive and disaggregated data on complaints, investigations, prosecutions and convictions of cases of torture and ill-treatment by law enforcement officials, as well as on trafficking and domestic and sexual violence. The Committee also regrets the lack of statistics in respect of asylum-seekers and non-citizens as well as inter-prisoner violence (arts. 12 and 13). The State party should establish an effective system to gather all statistical data relevant to the monitoring of the implementation of the Convention at the national level, including complaints, investigations, prosecutions and convictions of cases of torture and ill-treatment, inter-prisoner violence, trafficking and domestic and sexual violence. The Committee recognizes the sensitive implications of gathering personal data and emphasizes that appropriate measures should be taken to ensure that such data collection is not abused. 23. While taking note of the statement by the delegation that serious and ongoing discussions are taking place regarding the possible future ratification of the Optional Protocol to the Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment, the Committee encourages the State party to ratify the Optional Protocol. 24. The Committee invites the State party to ratify the core United Nations human rights treaties to which it is not yet a party, namely the Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families and the Convention on the Rights of Persons with Disabilities. The Committee also invites the State party to ratify the International Convention for the Protection of All Persons from Enforced Disappearance. 25. The Committee recommends that the State party consider making the declarations under articles 21 and 22 of the Convention. 26. The Committee invites the State party to submit its core document in accordance with the requirements of the common core document in the harmonized guidelines on reporting, as approved by the international human rights treaty bodies and contained in document HRI/GEN/2/Rev.5. 27. The State party is encouraged to disseminate widely the reports submitted by Lithuania to the Committee and the concluding observations, in appropriate languages, through official websites, the media and non-governmental organizations. 28. The Committee requests the State party to provide, within one year, information on its response to the Committee’s recommendations contained in paragraphs 7, 12, 14 and 15 above. 29. The State party is invited to submit its next periodic report, which will be considered as its third periodic report, by 21 November 2012. -----