thanks for the additional links, that UN document makes for depressing reading - but a valuable source of data.
Interesting that they talk about the need to collects accurate data in the conclusion section
Standardized data on gender-related killings of women and girls remain patchy and of insufficient quality to enable the monitoring of trends and understanding the scale of the problem. Implementation of the International Classification of Crime for Statistical Purposes (ICCS) enables countries to develop a standardized and sustainable way of recording the gender-based dimension of all offences and facilitates the measurement of violence against women and girls. Among its many features, the ICCS classification defines a standard framework for recording the gender characteristics of victims and perpetrators in
relation to all crimes, including homicide. It can therefore add value to collected data, allowing for a more thorough, in-depth analysis, as well as a comparable system of data collection across countries for gender- related killings of women and girls