In 100% juice blends, what percentage is apple juice?

i buy some 100% fruit juices, like nature's nectar pomegranate plum, cranberry pomegranate, cherry or fruit punch at aldi and apple juice is the first ingredient but when i e-mailed nature's nectar asking for the percentages of juice in their blends, they refused to tell me, saying it was a trade secret. i suspect these blends are more than 90% apple juice but i have searched online for this information several hours "fruitlessly". i have not bought any since they refused to tell me and i know apple juice is one of the least beneficial juices to drink. if anyone out there knows of a website that has solid information on this, please let me know. thanks.