What percentage of California grapes are turned into wine?

It's impossible to give an exact percentage of California grapes turned into wine. Here's why:

* Varying Production: The percentage fluctuates annually depending on factors like weather, market demand, and grape variety availability.

* Multiple Uses: Grapes are used for a variety of purposes besides wine, including raisins, juice, and even table grapes.

* No Centralized Data: There isn't a single source that tracks the exact percentage of California grapes used for wine production.

However, we can say that the majority of California grapes are indeed used for winemaking. California is the top wine-producing state in the United States and a major contributor to global wine production.

If you're interested in specific figures, you could try contacting the California Department of Food and Agriculture or the Wine Institute of California. They might have more specific data on grape production and usage.