The internationally respected journal The Lancet reported the startling numbers in this article:
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736%2818%2930806-7/fulltext
Self-harm (light green in this chart) occurs much more often than violence to other people (dark green in this chart).
See this table. Scroll down to see the startlingly high numbers for the USA:
