In this section you will use two indicators to assess a country's level of economic development. These indicators are Gross National Income (GNI) per capita and the percentage of the labor force engaged in non-agricultural labor. GNI is a commonly used indicator of economic development as it measures the value of wealth in a society, per person. For its part, the proportion of the population engaged in non-agricultural activities is also a commonly used measure of economic development because it tells us something about the level of industrialization in an economy - because subsistence agriculture is extremely labor-intensive, a country with an economy based primarily on subsistence agriculture has few resources to invest in industry and services. As a country develops its technological and industrial capacities, a smaller percentage of the labor force is needed to produce the food required by the population and so a larger proportion of the labor force can be diverted into manufacturing and servicesector activities. In order to complete this part of the exercise, you will need to calculate the rankings for each of the 20 countries for both measures of economic development presented (GNI per capita and percentage of the population employed in non-agricultural