How to explain premium increases to clients during commercial insurance renewal?

When commercial insurance premiums rise at renewal, the client's first reaction is usually, "I didn't have any claims this year, so why the increase?" Simply saying the market is up is useless; it sounds like an excuse. I now break down renewals into points the client can understand: industry rates, loss runs, changes in revenue or payroll, vehicle and driver lists, coverage limits, deductibles…