1948 is a good place to start, since it marks the creation of the State of Israel. There was plenty of bloodshed leading up to 1948, but accurate numbers on that will probably be harder to find.
Understanding the history - and the lopsidedness - of casualties and losses:
https://en.wikipedia.org/wiki/Israeli%E2%80%93Palestinian_conflict
Running these numbers puts Palestinian casualties and losses at about 80% vs 20% on the Israeli side.
1987 - 2021, showing Palestinian vs Israeli deaths - overwhelmingly on the Palestinian side.
Below chart showing every fatality from September 2000 to July 2014:
https://www.vox.com/2014/7/14/5898581/chart-israel-palestine-conflict-deaths
It's no secret that the death tolls in the Israel-Palestine conflict are lopsided, with Palestinians far more likely to be killed than Israelis. But just how lopsided is driven home by looking at the month-to-month fatality statistics, which the Israeli human rights organization B'Tselem has been tracking since September 2000. Those numbers also tell some important stories about the conflict, how it's changed, and maybe where it's going.
…the overwhelming majority of the deaths are Palestinian, and have been for the almost 14 years since B'Tselem began tracking. Overall, the group has recorded 8,166 conflict-related deaths, of which 7,065 are Palestinian and 1,101 Israeli. That means 87 percent of deaths have been Palestinian and only 13 percent Israeli. Put another way, for every 15 people killed in the conflict, 13 are Palestinian and two are Israeli. (Statistics for the past two months are from United Nations Office for the Coordinator of Humanitarian Affairs.)
That number is even more staggering when you consider that there are about twice as many Israelis as there are Palestinians. This means, very roughly, that a Palestinian person has been 15 times more likely to be killed by the conflict than an Israeli person. Of course the conflict impacts Palestinians and Israelis far beyond just conflict deaths, but these statistics help show how utterly disproportionate the conflict has become in its toll.
The disparity has widened dramatically over time. Since January 2005, when the conflict began to change dramatically, it has killed 4,006 people, of whom 168 have been Israeli and 3,838 Palestinian. That means that, since January 2005, only four percent of those killed have been Israeli, and 96 percent Palestinian. Since January 2005, in other words, the conflict has killed 23 Palestinians for every one Israeli it claims.
A 76-year conflict - with casualties and deaths that are severely skewed in one direction - makes us wonder how remarkable it is that the political-nationalist entity known as the State of Israel is continually portrayed as a victim, ignoring the fact that it has been hammering the crap out of the Palestinian people for 3/4 of a century - aided, abetted and financed by the United States.