public Dictionary<TechField, int> GetFieldLevels()
{
Dictionary<TechField, int> fields = new Dictionary<TechField, int>();
fields[TechField.COMPUTER] = ComputerLevel;
fields[TechField.CONSTRUCTION] = ConstructionLevel;
fields[TechField.FORCE_FIELD] = ForceFieldLevel;
fields[TechField.PLANETOLOGY] = PlanetologyLevel;
fields[TechField.PROPULSION] = PropulsionLevel;
fields[TechField.WEAPON] = WeaponLevel;
return fields;
}