Lisa ... the data for Berries on that chart come from the excellent Fineli database (which collects together alot of the reference material on fruit and vegetables. I also cross referenced it to the USDA's standard food components database as a cross-check.
Here's the Fineli data for strawberries http://www.fineli.fi/food.php?foodid=447&lang=en
and here's the one for blueberries http://www.fineli.fi/food.php?foodid=442&lang=en
I like them because they are one of the few data sources which break the sugars down into glucose, fructose and sucrose.
Cheers
David.