Do you have a source for that?
I'm genuinely interested, as the home defence argument is often put forward, but numbers are rarely, if ever, provided.
I'm not doing this in a "LINK OR IT NEVAR HAPOENED" spirit- I'd like to know how that can be measured. I'm guessing it is from reported crimes, but would like to know.
The main source is the CDC. When Obama was president, he authorised the CDC to investigate. Presumably he was expecting the results to support more restrictions on gun ownership (which was what he wanted), but they didn't. Quite the opposite.
It's also clear that the truth is uncertain. The CDC did a meta-analysis of research as part of their investigation and the numbers vary a
lot. That generally indicates unreliable numbers. But even the lowest figures for defensive use of firearms in the USA are substantial.
You can find a very brief summary and a link to the CDC's most recent report here:
https://www.cdc.gov/violenceprevention/firearms/fastfact.html
It's about halfway down, under the heading "What is defensive gun use? How often does it occur?"
There's a bit of a discussion, including references to the 1996-98 investigation by the CDC (the results of which were quietly ignored and buried for years) here:
https://www.forbes.com/sites/paulhsieh/2018/04/30/that-time-the-cdc-asked-about-defensive-gun-uses/
I tried to pick out sites that weren't obviously biased one way or the other. There are plenty of those.
It's also worth noting that most defensive gun uses don't involve firing a gun. The usual defensive use scenario starts and ends with a person displaying a gun. "If you attack me I will shoot you with this gun. It would be better for you to go away" is likely to be an effective message for defence.
I've seen arguments that the higher estimates for defensive gun use are higher than the number of reported gun crimes, as if that was a completely compelling argument against the existence of defensive gun use. It obviously isn't. Say, for example, I'm trying to steal your phone (no gun crime) and you show me your legally held gun and tell me to get lost (no gun crime). Defensive use of a gun and no gun crime. Even if you reported it, it's still not a reported gun crime because it isn't a gun crime.