The common ratio between dynamic and static classes is between 20%-25% after the learning (usually good coverage)

The reason for that is:

• classes that were not instantiated (interfaces, abstract classes with no methods)
• classes that were optimized out by the compiler, e.g., const classes and enums, entity classes with just getters and setters, inlining of methods

Also, pay attention to the dead-code classes under Application to see if important classes were not covered by the learning.