The 2013 release of the Natural Resource Protection Indicator (NRPI) and the Child Health Indicator (CHI) are computed as a standardized proximity-to-target ranging from 0 (worst performance) to 100 (at target or best performance). For the NRPI, all scores by biome are capped at 17%. The scores are capped so that greater than 17% protection in a given biome does not offset less than 17% protection in another biome. Since the range of protection levels across all countries is from 0-17%, the proximity to target scores is then calculated as the ratio of the weighted biome protection percentage to 17%, multiplied by 100. Thus, a country with 5% weighted biome protection would be calculated as follows: 5/17 = 0.29411; 0.29411 x 100 = 29.41. The CHI is a simple average of the three proximity-to-target scores for access to adequate sanitation, access to improved water, and child mortality. For access to adequate sanitation and access to improved water, the proximity-to-target measure is equal to the reported percentage. For example, if a country has 84% of its population with access to adequate sanitation, it is considered to have a proximity-to-target score of 84. For child mortality, we compute the ratio of the measured probability of dying to the highest observed probability of dying in the whole time series, which was 9.99 per 100 children in Mali in 2006, multiply that by 100, and then subtract from 100 to normalize it on the 0-100 scale (the formula is 100-((country value) / 9.99) * 100). For example, a country whose children in the 1-5 age group have a probability of dying of 0.4 per 100 would have a proximity-to-target score of 95.9 (or 100-((0.4/9.99) * 100)).