Do you have a budget for approval at the AGM, whch should show:
1. Estimate of administrative expenditure for coming 12 months
2. Funds which should be in the sinking fund to cover future needs.
3. Funds currently available.
1 + 2 – 3 = funds needed for coming year.
Personally I would not suggest lowering levies. Better to hold them at current levels and offset future increases.