static const Map<String, double> scaleValues = { '0': 0.0, '50': 0.5, '75': 0.75, '90': 0.9, '95': 0.95, '100': 1.0, '105': 1.05, '110': 1.1, '125': 1.25, '150': 1.5, '200': 2.0, };