Much has been decriminalized in California, so I question if these types of statistics can be accurate.

Theft has been decriminalized in California?

Difficulty: people may not even bother reporting minor property crimes anymore, because the police (and, more important, the prosecutors) DGAF.

You might not realise it but you've recreated a famous bit from the news satire "Brass Eye" - a news presenter shows some crime statistics and follows it up with the words "So much for recorded crimes, but crimes we know nothing about are going up as well" and displays this graphic:

https://twitter.com/dannyjeremiah/status/472109093260648450

That article hasn't been updated for the massive increase in crime from the past two years.