Average Contribution Amount For purposes of this Agreement, to ensure that all employees enrolled in health insurance through the City’s HSS are making premium contributions under the Percentage-Based Contribution Model, and therefore have a stake in controlling the long term growth in health insurance costs, it is agreed that, to the extent the City's health insurance premium contribution under the Percentage-Based Contribution Model is less than the “average contribution,” as established under Charter section A8.428(b), then, in addition to the City’s contribution, payments toward the balance of the health insurance premium under the Percentage-Based Contribution Model shall be deemed to apply to the annual “average contribution.” The parties intend that the City’s contribution toward employee health insurance premiums will not exceed the amount established under the Percentage-Based Contribution Model.