Children that have not had secure, nurturing, and stimulating experiences in their early years are at higher risk of many challenges later on in life, including mental health problems, obesity, heart disease, and criminality. The Early Development Instrument (E.D.I.) measures childhood vulnerability along 5 scales: physical health and well being; social competence; emotional maturity; language and cognitive development; communication and general knowledge. The percentage of children that are vulnerable in at least one scale of the E.D.I. is a measure of population health, and the City aims to see a 15% reduction in this number by 2015. Data Source: UBC's Human Early Learning Partnership.