B’tselem is the Israeli Information Center for Human Rights in the Occupied Territories. B’tselem works to expose the injustice, violence and dispossession inherent to the regime of occupation, to deconstruct the apparatuses that enable it, and challenge its legitimacy in Israel and internationally.
B’tselem is a source of statistics on fatalities in the Israel/Palestine conflict. For example, these B’tselem data show that 14 Israeli minors were killed by Palestinians between 19 January 2009 – 30 April 2020, while 801 Palestinian minors were killed by Israeli security forces. 19 Israeli women were killed over that period and 342 Palestinian women.
You can read B’tselem’s 2019 annual report here: https://www.btselem.org/sites/default/files2/2019_activity_report.pdf.